109 results on '"Knüppel, S."'
Search Results
2. The influence of adjustment for energy misreporting on relations of cake and cookie intake with cardiometabolic disease risk factors
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Gottschald, M, Knüppel, S, Boeing, H, and Buijsse, B
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- 2016
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3. Breakfast quality and cardiometabolic risk profiles in an upper middle-aged German population
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Iqbal, K, Schwingshackl, L, Gottschald, M, Knüppel, S, Stelmach-Mardas, M, Aleksandrova, K, and Boeing, H
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- 2017
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4. Shrinkage method for estimating the occurrence probability of a repeated measured binary variable
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Knüppel, S and Müller-Graf, C
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statistical method ,shrinkage ,ddc: 610 ,multiple source method ,repeated measurement ,610 Medical sciences ,Medicine ,binary outcome - Abstract
In order to obtain more precise information, larger and larger studies with more and more measurements are being carried out. Suitable statistical methods are needed to analyze such a large amount of data. A special case is the analysis of repeated measurements. For example, in the large multi-center[for full text, please go to the a.m. URL], 65th Annual Meeting of the German Association for Medical Informatics, Biometry and Epidemiology (GMDS), Meeting of the Central European Network (CEN: German Region, Austro-Swiss Region and Polish Region) of the International Biometric Society (IBS)
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- 2021
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5. The MSM program: web-based statistics package for estimating usual dietary intake using the Multiple Source Method
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Harttig, U, Haubrock, J, Knüppel, S, and Boeing, H
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- 2011
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6. SUN-PO198: The Prevalence of Malnutrition According to the New GLIM Definition in Chronic Small and Large Intestinal Diseases
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Knappe-Drzikova, B., primary, Maasberg, S., additional, Vonderbeck, D., additional, Knüppel, S., additional, Schirbel, A., additional, Grunert, P.C., additional, Pevny, S., additional, Norman, K., additional, and Pape, U.-F., additional
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- 2019
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7. A method for sensitivity analysis to assess the effects of measurement error in multiple exposure variables using external validation data
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Agogo, G.O. Van Der Voet, H. Van 'T Veer, P. Ferrari, P. Muller, D.C. Sánchez-Cantalejo, E. Bamia, C. Braaten, T. Knüppel, S. Johansson, I. Van Eeuwijk, F.A. Boshuizen, H.C.
- Abstract
Background: Measurement error in self-reported dietary intakes is known to bias the association between dietary intake and a health outcome of interest such as risk of a disease. The association can be distorted further by mismeasured confounders, leading to invalid results and conclusions. It is, however, difficult to adjust for the bias in the association when there is no internal validation data. Methods: We proposed a method to adjust for the bias in the diet-disease association (hereafter, association), due to measurement error in dietary intake and a mismeasured confounder, when there is no internal validation data. The method combines prior information on the validity of the self-report instrument with the observed data to adjust for the bias in the association. We compared the proposed method with the method that ignores the confounder effect, and with the method that ignores measurement errors completely. We assessed the sensitivity of the estimates to various magnitudes of measurement error, error correlations and uncertainty in the literature-reported validation data. We applied the methods to fruits and vegetables (FV) intakes, cigarette smoking (confounder) and all-cause mortality data from the European Prospective Investigation into Cancer and Nutrition study. Results: Using the proposed method resulted in about four times increase in the strength of association between FV intake and mortality. For weakly correlated errors, measurement error in the confounder minimally affected the hazard ratio estimate for FV intake. The effect was more pronounced for strong error correlations. Conclusions: The proposed method permits sensitivity analysis on measurement error structures and accounts for uncertainties in the reported validity coefficients. The method is useful in assessing the direction and quantifying the magnitude of bias in the association due to measurement errors in the confounders. © 2016 The Author(s).
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- 2016
8. Grundlagen der Anwendung von DAG-Programmen
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Knüppel S
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Computer graphics ,Identification (information) ,Theoretical computer science ,Computer program ,Computer science ,Backtracking ,Public Health, Environmental and Occupational Health ,Adjacency list ,Adjacency matrix ,Directed acyclic graph ,Causality ,MathematicsofComputing_DISCRETEMATHEMATICS - Abstract
The application of causal graphs is a useful tool to visualize the relationship between variables and allows the identification of causal and non-causal effects. If the strict rules of the DAG theory are followed, then it is possible to identify confounding and other sources of bias. In this article we show the backtracking algorithm to find all paths of a directed acyclic graph (DAG). The knowledge of the paths can be used to identify systematically all minimally sufficient adjustment sets. The search follows formal rules and can be done by a computer program. The adjacency list and adjacency matrix, which can be used as input for a computer program, are 2 representational forms of a causal graph.
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- 2011
9. Updated Multiple Source Method (MSM)
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Knüppel, S, additional, Walter, A, additional, and Boeing, H, additional
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- 2017
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10. Interindividual, intraindividual and intermeal variance in energy and macronutrient intake: a multilevel analysis
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Gottschald, M, additional, Schwedhelm, C, additional, Knüppel, S, additional, and Boeing, H, additional
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- 2017
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11. Mahlzeitenmuster in Ghana und bei ghanaischen Migranten in Europa: Die RODAM Studie
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Aßmus, F, additional, Galbete, C, additional, Knüppel, S, additional, Schulze, MB, additional, and Danquah, I, additional
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- 2017
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12. Mangelernährung als prognostischer Faktor für das Langzeitüberleben der gastroenterologischen Patienten
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Knappe-Drzikova, B, additional, Pevny, S, additional, Vonderbeck, D, additional, Maasberg, S, additional, Sturm, A, additional, Knüppel, S, additional, Wiedenmann, B, additional, and Pape, UF, additional
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- 2017
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13. Eating out is different from eating at home among individuals who occasionally eat out. A cross-sectional study among middle-aged adults from eleven European countries
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Naska, A. Katsoulis, M. Orfanos, P. Lachat, C. Gedrich, K. Rodrigues, S.S.P. Freisling, H. Kolsteren, P. Engeset, D. Lopes, C. Elmadfa, I. Wendt, A. Knüppel, S. Turrini, A. Tumino, R. Ocké, M.C. Sekula, W. Nilsson, L.M. Key, T. Trichopoulou, A. Manoli, A. Vaz De Almeida, M.D. D'Addezio, L. Ricceri, F. Panico, S. Sieri, S. Skeie, G. Larsen, V. Oltarzewski, M. HECTOR Consortium
- Abstract
Eating out has been linked to the current obesity epidemic, but the evaluation of the extent to which out of home (OH) dietary intakes are different from those at home (AH) is limited. Data collected among 8849 men and 14 277 women aged 35-64 years from the general population of eleven European countries through 24-h dietary recalls or food diaries were analysed to: (1) compare food consumption OH to those AH; (2) describe the characteristics of substantial OH eaters, defined as those who consumed 25% or more of their total daily energy intake at OH locations. Logistic regression models were fit to identify personal characteristics associated with eating out. In both sexes, beverages, sugar, desserts, sweet and savoury bakery products were consumed more OH than AH. In some countries, men reported higher intakes of fish OH than AH. Overall, substantial OH eating was more common among men, the younger and the more educated participants, but was weakly associated with total energy intake. The substantial OH eaters reported similar dietary intakes OH and AH. Individuals who were not identified as substantial OH eaters reported consuming proportionally higher quantities of sweet and savoury bakery products, soft drinks, juices and other non-alcoholic beverages OH than AH. The OH intakes were different from the AH ones, only among individuals who reported a relatively small contribution of OH eating to their daily intakes and this may partly explain the inconsistent findings relating eating out to the current obesity epidemic. Copyright © The Authors 2015.
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- 2015
14. Random Survival Forest in practice: a method for modelling complex metabolomics data in time to event analysis
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Dietrich, S., Floegel, A., Troll, M., Kühn, T., Rathmann, W., Peters, A., Sookthai, D., von Bergen, Martin, Kaaks, R., Adamski, J., Prehn, C., Boeing, H., Schulze, M.B., Illig, T., Pischon, T., Knüppel, S., Wang-Sattler, R., Drogan, D., Dietrich, S., Floegel, A., Troll, M., Kühn, T., Rathmann, W., Peters, A., Sookthai, D., von Bergen, Martin, Kaaks, R., Adamski, J., Prehn, C., Boeing, H., Schulze, M.B., Illig, T., Pischon, T., Knüppel, S., Wang-Sattler, R., and Drogan, D.
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Background: The application of metabolomics in prospective cohort studies is statistically challenging. Given the importance of appropriate statistical methods for selection of disease-associated metabolites in highly correlated complex data, we combined random survival forest (RSF) with an automated backward elimination procedure that addresses such issues.Methods: Our RSF approach was illustrated with data from the European Prospective Investigation into Cancer and Nutrition (EPIC)-Potsdam study, with concentrations of 127 serum metabolites as exposure variables and time to development of type 2 diabetes mellitus (T2D) as outcome variable. Out of this data set, Cox regression with a stepwise selection method was recently published. Replication of methodical comparison (RSF and Cox regression) was conducted in two independent cohorts. Finally, the R-code for implementing the metabolite selection procedure into the RSF-syntax is provided.Results: The application of the RSF approach in EPIC-Potsdam resulted in the identification of 16 incident T2D-associated metabolites which slightly improved prediction of T2D when used in addition to traditional T2D risk factors and also when used together with classical biomarkers. The identified metabolites partly agreed with previous findings using Cox regression, though RSF selected a higher number of highly correlated metabolites.Conclusions: The RSF method appeared to be a promising approach for identification of disease-associated variables in complex data with time to event as outcome. The demonstrated RSF approach provides comparable findings as the generally used Cox regression, but also addresses the problem of multicollinearity and is suitable for high-dimensional data.
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- 2016
15. Kausale Graphen (DAGs II): Einführung, Aspekte und Ausblick der Anwendung kausaler Graphen (Directed Acyclic Graphs) in der Epidemiologie
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Hardt, J, Knüppel, S, Stang, A, Foraita, R, and Timmer, A
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Methodenworkshop ,Epidemiologische Methoden ,Kausalität ,kausale Graphen ,kausale Diagramme ,DAGs ,Directed Acyclic Graphs ,Confounding ,Bias ,ddc: 610 ,610 Medical sciences ,Medicine - Abstract
In diesem Workshop der AG Epidemiologische Methoden soll als Fortsetzung des ersten Methodenworkshops zum Thema DAGs am 26.11.2010 in Berlin die Anwendung kausaler Graphen in der Epidemiologie diskutiert werden und ein Ausblick auf fortgeschrittene Anwendungsbeispiele gegeben werden. (2x 90 min; [for full text, please go to the a.m. URL], GMDS 2012; 57. Jahrestagung der Deutschen Gesellschaft für Medizinische Informatik, Biometrie und Epidemiologie e.V. (GMDS)
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- 2012
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16. Statistical modelling of usual intake. Scientific report submitted to EFSA
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van der Voet, H., van Klaveren, J.D., Arcella, D., Bakker, M., Boeing, H., Boon, P.E., Crépét, A., Dekkers, A., de Boer, W., Dodd, K.W., Ferrari, P., Goedhart, P.W., Hart, A., van der Heijden, G.W.A.M., Kennedy, M., Kipnis, V., Knüppel, S., Merten, C., Ocké, M., and Slob, W.
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Biometris ,Life Science ,RIKILT - V&G Databanken Risicoschatting & Ketenmanagement - Abstract
Within the EFSA Article 36 project “European Tool Usual Intake” (ETUI) a workshop was organised in May 2010 where the different available models to calculate usual intake were presented and discussed. This report integrates the workshop background document, the presentations given by experts, and the discussions during the workshop. The purpose of the workshop was to evaluate existing statistical methods for estimating usual intake with respect to a number of criteria, so that the performance of each method on each criterion will be well understood after the workshop. The outcome of the workshop allows choices to be made for a European Tool Usual Intake, to be implemented in the remainder of the project. A starting document was provided to the participants of the workshop with up-to-date information on methods, data and criteria, as a basis for discussion. It was apparent from the workshop that there is not one optimal model for all cases, rather a toolbox approach is suitable. The choice of the most appropriate model has to be fine-tuned case by case. Criteria to be considered are related to data availability and data pre-processing (e.g. compatibility of existing data formats, need to handle complicating factors like food code conversion, left-censored data, processing factors, brand loyalty, pooling over multiple datasets), the appropriateness of modelling assumptions for frequencies and amounts modelling (e.g. level of conservatism, additivity assumption and data transformations, the need to model intake as a function of covariates, correlations), the usefulness to combine survey and food frequency questionnaire data, the need to model single food intake or diet-aggregated intake, the need to evaluate uncertainties, and the usefulness of implementations. For the short term, case studies will be performed based on issues relevant for EFSA panels. Results from the workshop and possibilities of using models to calculate usual intake were recently discussed during the 5th meeting of the EFSA Expert group on food consumption data. Currently only few EU Member States use this kind of models but there is a lot of interest in gaining experience with the usual intake modelling. Several requests were received concerning the possibility of having more information about the ETUI project and even the organisation of a future training. In conclusion, this interim report is considered by EFSA to be a good review of the different models used and presents the main challenges related to the use of these techniques. Its publication could be useful to those who want to start using this kind of methodology
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- 2010
17. Use of Two-Part Regression Calibration Model to Correct for Measurement Error in Episodically Consumed Foods in a Single-Replicate Study Design: EPIC Case Study
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Agogo, G.O., van der Voet, H., van 't Veer, P., Ferrari, P., Leenders, M., Muller, D.C., Sánchez-Cantalejo, E., Bamia, C., Braaten, T., Knüppel, S., Johansson, I., van Eeuwijk, F.A., Boshuizen, H.C., Agogo, G.O., van der Voet, H., van 't Veer, P., Ferrari, P., Leenders, M., Muller, D.C., Sánchez-Cantalejo, E., Bamia, C., Braaten, T., Knüppel, S., Johansson, I., van Eeuwijk, F.A., and Boshuizen, H.C.
- Abstract
In epidemiologic studies, measurement error in dietary variables often attenuates association between dietary intake and disease occurrence. To adjust for the attenuation caused by error in dietary intake, regression calibration is commonly used. To apply regression calibration, unbiased reference measurements are required. Short-term reference measurements for foods that are not consumed daily contain excess zeroes that pose challenges in the calibration model. We adapted two-part regression calibration model, initially developed for multiple replicates of reference measurements per individual to a single-replicate setting. We showed how to handle excess zero reference measurements by two-step modeling approach, how to explore heteroscedasticity in the consumed amount with variance-mean graph, how to explore nonlinearity with the generalized additive modeling (GAM) and the empirical logit approaches, and how to select covariates in the calibration model. The performance of two-part calibration model was compared with the one-part counterpart. We used vegetable intake and mortality data from European Prospective Investigation on Cancer and Nutrition (EPIC) study. In the EPIC, reference measurements were taken with 24-hour recalls. For each of the three vegetable subgroups assessed separately, correcting for error with an appropriately specified two-part calibration model resulted in about three fold increase in the strength of association with all-cause mortality, as measured by the log hazard ratio. Further found is that the standard way of including covariates in the calibration model can lead to over fitting the two-part calibration model. Moreover, the extent of adjusting for error is influenced by the number and forms of covariates in the calibration model. For episodically consumed foods, we advise researchers to pay special attention to response distribution, nonlinearity, and covariate inclusion in specifying the calibration model.
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- 2014
18. SUN-P086: Malnutrition Predicts Long-Term Mortality in Hospitalized Gastroenterological Cancer Patients
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Knappe-Drzikova, B., Maasberg, S., Vonderbeck, D., Sturm, A., Pascher, A., Knuppel, S., and Pape, U.-F.
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- 2017
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19. A comparison by simulation of different methods to estimate the usual intake distribution for episodically consumed foods.
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Goedhart, P.W., van der Voet, Hilko, Knüppel, S., Dekkers, A.L.M., Dodd, K.W., Boeing, H., van Klaveren, J.D., Goedhart, P.W., van der Voet, Hilko, Knüppel, S., Dekkers, A.L.M., Dodd, K.W., Boeing, H., and van Klaveren, J.D.
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- 2012
20. Gerichtete, azyklische Graphen: Entgegnungen zu methodischen Bedenken
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Stang, A., additional, Schipf, S., additional, and Knüppel, S., additional
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- 2011
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21. Directed Acyclic Graphs (DAGs) – Die Anwendung kausaler Graphen in der Epidemiologie
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Schipf, S., additional, Knüppel, S., additional, Hardt, J., additional, and Stang, A., additional
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- 2011
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22. Beeinflusst die Migrationserfahrung das Erstkonsumalter bei Drogenabhängigen? – Eine Studie im Suchthilfeverbund Konstanz
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Odenwald, M, primary, Friedrich, K, additional, Knüppel, S, additional, Becker, C, additional, Rieker, R, additional, and Höcker, W, additional
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- 2011
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23. Methods to estimate precision of factor loadings in dietary pattern analysis
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Knüppel, S, primary, Boeing, H, additional, and Buijsse, B, additional
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- 2010
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24. Polymorphisms in fatty acid metabolism-related genes are associated with colorectal cancer risk
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Yvoni Koumantaki, Elio Riboli, Bethany Van Guelpen, Nicholas J. Wareham, Paolo Vineis, Birgit Hoeft, Karin Jirström, Elizabeth A Spencer, Jonas Manjer, Göran Hallmans, H. B. Bueno-De-Mesquita, Ulla Vogel, Veronique Chajes, Carla H. van Gils, Paolo Boffetta, Heiner Boeing, Lars Beckmann, Kim Overvad, Rikke Dalgaard Hansen, Marianne Uhre Jakobsen, Laudina Rodríguez, Franco Berrino, Eiliv Lund, Mazda Jenab, Petra H.M. Peeters, Sophie Morois, Traci Mouw, Jakob Linseisen, Teresa Norat, Aurelio Barricarte, F. Clavel-Chapelon, Karin Müller-Decker, Fränzel J.B. Van Duijnhoven, Francesca L. Crowe, José María Huerta Castaño, Dimitrios Trichopoulos, Antonia Trichopoulou, Sven Knüppel, Rudolf Kaaks, Federico Canzian, Domenico Palli, Vanessa Dumeaux, Alexandra Nieters, Kay-Tee Khaw, Anika Hüsing, Xavier Muñoz, Rosario Tumino, Marie-Christine Boutron-Ruault, Salvatore Panico, Hoeft, B, Linseisen, J, Beckmann, L, Müller Decker, K, Canzian, F, Hüsing, A, Kaaksr, Vogel, U, Jakobsen, Mu, Overvad, K, Hansen, Rd, Knüppel, S, Boeing, H, Trichopoulou, A, Koumantaki, Y, Trichopoulos, D, Berrino, F, Palli, D, Panico, Salvatore, Tumino, R, Bueno de Mesquita, Hb, van Duijnhoven, Fj, van Gils, Ch, Peeters, Ph, Dumeaux, V, Lunde, Huerta Castaño, Jm, Muñoz, X, Rodriguez, L, Barricarte, A, Manjer, J, Jirström, K, Van Guelpen, B, Hallmans, G, Spencer, Ea, Crowe, Fl, Khaw, Kt, Wareham, N, Morois, S, Boutron Ruault, Mc, Clavel Chapelon, F, Chajes, V, Jenab, M, Boffetta, P, Vineis, P, Mouw, T, Norat, T, Riboli, E, Nieters, A., Hoeft, B., Linseisen, J., Beckmann, L., Müller-Decker, K., Canzian, F., Hüsing, A., Kaaks, R., Vogel, U., Jakobsen, M.U., Overvad, K., Hansen, R.D., Knüppel, S., Boeing, H., Trichopoulou, A., Koumantaki, Y., Trichopoulos, D., Berrino, F., Palli, D., Panico, S., Tumino, R., Buenode-Mesquita, H.B., van Duijnhoven, F.J.B., van Gils, C.H., Peeters, P.H., Dumeaux, V., Lund, E., Huerta Castaño, J.M., Muñoz, X., Rodriguez, L., Barricarte, A., Manjer, J., Jirström, K., van Guelpen, B., Hallmans, G., Spencer, E.A., Crowe, F.L., Khaw, K.-T., Wareham, N., Morois, S., Boutron-Ruault, M.-C., Clavel-Chapelon, F., Chajes, V., Jenab, M., Boffetta, P., Vineis, P., Mouw, T., Norat, T., and Riboli, E.
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Oncology ,Male ,Cancer Research ,Colorectal cancer ,Cohort Studies ,0302 clinical medicine ,Genetics ,0303 health sciences ,Group III Phospholipases A2 ,Fatty Acids ,Smoking ,General Medicine ,3. Good health ,European Prospective Investigation into Cancer and Nutrition ,Neoplasm Proteins ,Europe ,030220 oncology & carcinogenesis ,Hydroxyprostaglandin Dehydrogenases ,Female ,Colorectal Neoplasms ,medicine.medical_specialty ,Genotype ,TRPV Cation Channels ,colorectal cancer ,Single-nucleotide polymorphism ,Biology ,Adenocarcinoma ,Polymorphism, Single Nucleotide ,Group VI Phospholipases A2 ,03 medical and health sciences ,Internal medicine ,medicine ,Humans ,Receptors, Prostaglandin E ,ddc:610 ,Polymorphism ,Allele frequency ,Alleles ,Genetic Association Studies ,030304 developmental biology ,Haplotype ,Cancer ,Odds ratio ,Receptors, Prostaglandin E, EP2 Subtype ,medicine.disease ,Minor allele frequency ,Haplotypes ,Case-Control Studies ,fatty acid ,metabolism - Abstract
Colorectal cancer (CRC) is the third most common malignant tumor and the fourth leading cause of cancer death worldwide. The crucial role of fatty acids for a number of important biological processes suggests a more in-depth analysis of inter-individual differences in fatty acid metabolizing genes as contributing factor to colon carcinogenesis. We examined the association between genetic variability in 43 fatty acid metabolism-related genes and colorectal risk in 1225 CRC cases and 2032 controls participating in the European Prospective Investigation into Cancer and Nutrition study. Three hundred and ninety two single-nucleotide polymorphisms were selected using pairwise tagging with an r2 cutoff of 0.8 and a minor allele frequency of >5%. Conditional logistic regression models were used to estimate odds ratios and corresponding 95% confidence intervals. Haplotype analysis was performed using a generalized linear model framework. On the genotype level, hydroxyprostaglandin dehydrogenase 15-(NAD) (HPGD), phospholipase A2 group VI (PLA2G6) and transient receptor potential vanilloid 3 were associated with higher risk for CRC, whereas prostaglandin E receptor 2 (PTGER2) was associated with lower CRC risk. A significant inverse association (P < 0.006) was found for PTGER2 GGG haplotype, whereas HPGD AGGAG and PLA2G3 CT haplotypes were significantly (P < 0.001 and P = 0.003, respectively) associated with higher risk of CRC. Based on these data, we present for the first time the association of HPGD variants with CRC risk. Our results support the key role of prostanoid signaling in colon carcinogenesis and suggest a relevance of genetic variation in fatty acid metabolism-related genes and CRC risk. © The Author 2009. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org.
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- 2010
25. Use of Two-Part Regression Calibration Model to Correct for Measurement Error in Episodically Consumed Foods in a Single-Replicate Study Design: EPIC Case Study
- Author
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Agogo, George O, der Voet, Hilko van, Veer, Pieter Van't, Ferrari, Pietro, Leenders, Max, Muller, David C, Sánchez-Cantalejo, Emilio, Bamia, Christina, Braaten, Tonje, Knüppel, Sven, Johansson, Ingegerd, van Eeuwijk, Fred A, Boshuizen, Hendriek, LS IRAS EEPI GRA (Gezh.risico-analyse), IRAS RATIA-SIB, Risk Assessment of Toxic and Immunomodulatory Agents, [Agogo,GO, Boshuizen,H] National Institute for Public Health and the Environment, Bilthoven, The Netherlands. [Agogo,GO, Voet,HV, Eeuwijk,FAV, Boshuizen,H] Biometris, Wageningen University and Research Center, Wageningen, The Netherlands.[Veer,PV, Boshuizen,H] Department of Human Nutrition, Wageningen University and Research Center, Wageningen, The Netherlands. [Ferrari,P] Nutritional Epidemiology Group, International Agency for Research on Cancer, Lyon, France. [Leenders,M] Department of Gastroenterology and Hepatology, University Medical Center Utrecht, Utrecht, The Netherlands. [Muller,DC] Genetic Epidemiology Group, International Agency for Research on Cancer, Lyon, France. [Sánchez-Cantalejo,E] Andalusian School of Public Health, Granada, Spain. CIBER de Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain. [Bamia,C] WHO Collaborating Center for Food and Nutrition Policies, Department of Hygiene, Epidemiology and Medical Statistics, University of Athens Medical School, Athens, Greece. [Braaten,T] Department of Community Medicine, University of Tromsø, Tromsø, Norway. [Knüppel,S] Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Potsdam, Germany. [Johansson,I] Department of Odontology, Umea University, Umea, Sweden., However, the publication cost will be covered by Wageningen University and Research Centre, Biometris, P.O. Box 100, 6700 AC WAGENINGEN should the paper be accepted for a publication., LS IRAS EEPI GRA (Gezh.risico-analyse), IRAS RATIA-SIB, and Risk Assessment of Toxic and Immunomodulatory Agents
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Male ,Parametric Analysis ,Medicin och hälsovetenskap ,Nutrition and Disease ,Calibration (statistics) ,Test Statistics ,lcsh:Medicine ,markers ,Overfitting ,Statistical Inference ,outcomes ,Medical and Health Sciences ,Wiskundige en Statistische Methoden - Biometris ,Mathematical and Statistical Techniques ,Neoplasms ,Surveys and Questionnaires ,Voeding en Ziekte ,Statistics ,Medicine ,Prospective Studies ,lcsh:Science ,Multidisciplinary ,Maximum Likelihood Estimation ,Regression analysis ,Estudios Prospectivos ,Replicate ,Diseases::Neoplasms [Medical Subject Headings] ,Middle Aged ,PE&RC ,Neoplasias ,Diet Records ,Europe ,Survival Rate ,Biometris ,nutrition ,Physical Sciences ,Calibration ,instruments ,Regression Analysis ,Dieta ,Female ,dietary self-report ,Statistics (Mathematics) ,Bayesian Statistics ,Research Article ,Adult ,Heteroscedasticity ,Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Epidemiologic Study Characteristics as Topic::Epidemiologic Studies::Cohort Studies::Longitudinal Studies::Prospective Studies [Medical Subject Headings] ,General Science & Technology ,Logit ,Phenomena and Processes::Physiological Phenomena::Nutritional Physiological Phenomena::Diet [Medical Subject Headings] ,Research and Analysis Methods ,Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Data Collection::Nutrition Assessment [Medical Subject Headings] ,Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Epidemiologic Study Characteristics as Topic::Epidemiologic Studies::Cohort Studies::Longitudinal Studies [Medical Subject Headings] ,Covariate ,MD Multidisciplinary ,Humans ,cancer ,Statistical Methods ,Statistical Hypothesis Testing ,Mathematical and Statistical Methods - Biometris ,Aged ,VLAG ,disease ,Observational error ,Models, Statistical ,business.industry ,lcsh:R ,Evaluación Nutricional ,Feeding Behavior ,Estudios Longitudinales ,Estudios Epidemiológicos ,Survival Analysis ,Nutrition Assessment ,lcsh:Q ,Food Habits ,business ,Mathematics ,Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Epidemiologic Study Characteristics as Topic::Epidemiologic Studies [Medical Subject Headings] ,Generalized Linear Model - Abstract
Journal Article; In epidemiologic studies, measurement error in dietary variables often attenuates association between dietary intake and disease occurrence. To adjust for the attenuation caused by error in dietary intake, regression calibration is commonly used. To apply regression calibration, unbiased reference measurements are required. Short-term reference measurements for foods that are not consumed daily contain excess zeroes that pose challenges in the calibration model. We adapted two-part regression calibration model, initially developed for multiple replicates of reference measurements per individual to a single-replicate setting. We showed how to handle excess zero reference measurements by two-step modeling approach, how to explore heteroscedasticity in the consumed amount with variance-mean graph, how to explore nonlinearity with the generalized additive modeling (GAM) and the empirical logit approaches, and how to select covariates in the calibration model. The performance of two-part calibration model was compared with the one-part counterpart. We used vegetable intake and mortality data from European Prospective Investigation on Cancer and Nutrition (EPIC) study. In the EPIC, reference measurements were taken with 24-hour recalls. For each of the three vegetable subgroups assessed separately, correcting for error with an appropriately specified two-part calibration model resulted in about three fold increase in the strength of association with all-cause mortality, as measured by the log hazard ratio. Further found is that the standard way of including covariates in the calibration model can lead to over fitting the two-part calibration model. Moreover, the extent of adjusting for error is influenced by the number and forms of covariates in the calibration model. For episodically consumed foods, we advise researchers to pay special attention to response distribution, nonlinearity, and covariate inclusion in specifying the calibration model. Yes
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- 2014
26. Development and Validation of a Risk Score Predicting Substantial Weight Gain over 5 Years in Middle-Aged European Men and Women
- Author
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Philippos Orfanos, Lefkos T. Middleton, Vittorio Krogh, Kuanrong Li, J. Ramón Quirós, Sven Knüppel, Birgit Teucher, Eva Ardanaz, Heiner Boeing, Anne M. May, Laureen Dartois, Guy Fagherazzi, Domenico Palli, Peter Wallström, Bo Hedblad, Jytte Halkjær, Rosario Tumino, Annika Steffen, José María Huerta, María José Sánchez, Amalia Mattiello, Nicholas J. Wareham, Kim Overvad, H. Bas Bueno-de-Mesquita, Kay-Tee Khaw, Daphne L. van der A, Antonia Trichopoulou, Miren Dorronsoro, Anne Tjønneland, Paolo Vineis, Thorkild I. A. Sørensen, Dimitrios Trichopoulos, Noémie Travier, Petra H.M. Peeters, Francesca L. Crowe, [Steffen,A, Knüppel,S, Boeing,H] Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany. [Sørensen,TIA] Instiute of Preventive Medicine, Bispebjerg and Frederiksberg Hospitals – Part of Copenhagen University Hospital, The Capital Region, Denmark. [Travier,N] Unit of Nutrition, Environment and Cancer, Catalan Institute of Oncology, Barcelona, Spain. [Sánchez,MJ] Andalusian School of Public Health, Granada, Spain. [Huerta,JM] Department of Epidemiology, Murcia Regional Health Council, Murcia, Spain. [Sánchez,MJ, Huerta,JM, Ardanaz,E] CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain. [Quirós,JR] Public Health Directorate, Asturias, Spain. [Ardanaz,E] Navarre Public Health Institute, Pamplona, Spain. [Dorronsoro,M] Basque Regional Health Department and Ciberesp – Biodonostia, San Sebastian, Spain. [Teucher,B, Li,K] Division of Cancer Epidemiology, German Cancer Research Center, Heidelberg, Germany. [Bueno-de-Mesquita,HB, A,D] National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands. [Bueno-de-Mesquita,HB] Department of Gastroenterology and Hepatology, University Medical Centre, Utrecht, The Netherlands. [Mattiello,A] Dipartimento di Medicina Clinica e Chirurgia, Frederico II University, Naples, Italy. [Palli,D] Molecular and Nutritional Epidemiology Unit, Cancer Research and Prevention Institute, Florence, Italy. [Tumino,R] Cancer Registry and Histopathology Unit, ‘‘Civile – M.P.Arezzo’’ Hospital, Ragusa, Italy. [Krogh,V] Nutritional Epidemiology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy. [Vineis,P] HuGeF Foundation Torino, Italy. [Trichopoulou,A, Orfanos,P, Trichopoulos,D] Hellenic Health Foundation, Athens, Greece. [Trichopoulou,A, Orfanos,P] WHO Collaborating Center for Food and Nutrition Policies, Department of Hygiene Epidemiology and Medical Statistics, University of Athens Medical School, Athens, Greece. [Trichopoulos,D] Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America. [Trichopoulos,D] Bureau of Epidemiologic Research, Academy of Athens, Athens, Greece. [Hedblad,B] Department of Clinical Sciences in Malmö, Clinical Research Centre, Skane University Hospital, Malmö, Sweden. [Wallström,P] Nutrition Epidemiology Research Group, Department of Clinical Sciences, Lund University, Malmö, Sweden. [Overvad,K] Section of Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark. [Halkjær,J, Tjønneland,A] Danish Cancer Society Research Center, Copenhagen, Denmark. [Fagherazzi,G, Dartois,L] Inserm, Centre for Research in Epidemiology and Population Health, Institut Gustave Roussy, Villejuif, France. Paris South University, Villejuif, France. [Crowe,F] Cancer Epidemiology Unit, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, United Kingdom. [Khaw,K] Clinical Gerontology Unit, University of Cambridge, Cambridge, United Kingdom. [Wareham,N] Medical Research Council (MRC) Epidemiology Unit, Institute of Metabolic Science, University of Cambridge, Cambridge, United Kingdom. [Vineis,P, Middleton,L] School of Public Health, Imperial College, London, United Kingdom. [May,AM, Peeters,PHM] Julius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht, Utrecht, The Netherlands. [Peeters,PHM] Department of Epidemiology and Public Health, Imperial College London, London, United Kingdom., This publication arises from a collaboration of two EU projects, the Diet, Obesity and Genes (DiOGenes) project and the Physical Activity, Nutrition, Alcohol, Cessation of Smoking, Eating out of Home and Obesity (PANACEA) project. DiOGenes is a pan-European study within the EU Sixth Framework Programme for Research and Technological Development (2005-2009) (FOOD-CT-2005-513946, http://www.diogenes.eu.org). PANACEA received funding from the EU in the framework of the Public Health Programme (project 2005328). This work was further supported by the European Commission: Public Health and Consumer Protection Directorate 1993–2004, the Research Directorate-General 2005, the Ligue contre le Cancer, the Societe´ 3M, the Mutuelle Ge´ne´ rale de l’Education Nationale, and the Institut National de la Sante´ et de la Recherche Me´ dicale, German Cancer Aid, the German Cancer Research Center, and the Federal Ministry of Education and Research (Germany), the Danish Cancer Society (Denmark), Health Research Fund (FIS) of the Spanish Ministry of Health RTICC ’Red Tema´tica de Investigacio´n Cooperativa en Ca´ncer (grant number C03/10, R06/0020), the participating regional governments and institutions of Spain, Cancer Research United Kingdom, the Medical Research Council, the Stroke Association, the British Heart Foundation, the Department of Health, the Food Standards Agency, and the Wellcome Trust (United Kingdom), the Italian Association for Research on Cancer and the National Research Council (Italy), the Dutch Ministry of Public Health, Welfare and Sports, the Dutch Ministry of Health, Dutch Prevention Funds, LK Research Funds, the Dutch Zorg Onderzoek Nederland, and the World Cancer Research Fund (Netherlands), and the Swedish Cancer Society, the Swedish Scientific Council, and the Regional Government of Skane. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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Male ,Gerontology ,Research Validity ,Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Statistics as Topic::Models, Statistical::Proportional Hazards Models [Medical Subject Headings] ,Non-Clinical Medicine ,Diseases::Pathological Conditions, Signs and Symptoms::Signs and Symptoms::Body Weight::Body Weight Changes::Weight Gain [Medical Subject Headings] ,Epidemiology ,lcsh:Medicine ,Named Groups::Persons::Age Groups::Adult::Middle Aged [Medical Subject Headings] ,Weight Gain ,Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Statistics as Topic::Probability::Risk::Risk Factors [Medical Subject Headings] ,Organisms::Eukaryota::Animals::Chordata::Vertebrates::Mammals::Primates::Haplorhini::Catarrhini::Hominidae::Humans [Medical Subject Headings] ,Cohort Studies ,Mediana Edad ,0302 clinical medicine ,Risk Factors ,Positive predicative value ,Aumento de Peso ,Cardiac and Cardiovascular Systems ,Prospective Studies ,030212 general & internal medicine ,Masculino ,lcsh:Science ,Factores de Riesgo ,education.field_of_study ,Multidisciplinary ,Framingham Risk Score ,Nutrition and Dietetics ,Adulto ,Femenino ,Geographicals::Geographic Locations::Europe [Medical Subject Headings] ,Epidemiology of Aging ,Estudios Prospectivos ,Middle Aged ,Research Assessment ,Humanos ,3. Good health ,European Prospective Investigation into Cancer and Nutrition ,Europe ,Medicine ,Female ,Public Health ,medicine.symptom ,Europa ,Research Article ,Adult ,Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Epidemiologic Study Characteristics as Topic::Epidemiologic Studies::Cohort Studies::Longitudinal Studies::Prospective Studies [Medical Subject Headings] ,Clinical Research Design ,Science Policy ,Anciano ,Population ,Check Tags::Male [Medical Subject Headings] ,030209 endocrinology & metabolism ,External validity ,03 medical and health sciences ,Named Groups::Persons::Age Groups::Adult [Medical Subject Headings] ,medicine ,Humans ,Obesity ,Named Groups::Persons::Age Groups::Adult::Aged [Medical Subject Headings] ,Statistical Methods ,education ,Aged ,Proportional Hazards Models ,Nutrition ,Health Care Policy ,Receiver operating characteristic ,business.industry ,Proportional hazards model ,lcsh:R ,Health Risk Analysis ,Check Tags::Female [Medical Subject Headings] ,lcsh:Q ,Modelos de Riesgos Proporcionales ,business ,Weight gain ,Demography - Abstract
Journal Article; Research Support, Non-U.S. Gov't; BACKGROUND Identifying individuals at high risk of excess weight gain may help targeting prevention efforts at those at risk of various metabolic diseases associated with weight gain. Our aim was to develop a risk score to identify these individuals and validate it in an external population. METHODS We used lifestyle and nutritional data from 53°758 individuals followed for a median of 5.4 years from six centers of the European Prospective Investigation into Cancer and Nutrition (EPIC) to develop a risk score to predict substantial weight gain (SWG) for the next 5 years (derivation sample). Assuming linear weight gain, SWG was defined as gaining ≥ 10% of baseline weight during follow-up. Proportional hazards models were used to identify significant predictors of SWG separately by EPIC center. Regression coefficients of predictors were pooled using random-effects meta-analysis. Pooled coefficients were used to assign weights to each predictor. The risk score was calculated as a linear combination of the predictors. External validity of the score was evaluated in nine other centers of the EPIC study (validation sample). RESULTS Our final model included age, sex, baseline weight, level of education, baseline smoking, sports activity, alcohol use, and intake of six food groups. The model's discriminatory ability measured by the area under a receiver operating characteristic curve was 0.64 (95% CI = 0.63-0.65) in the derivation sample and 0.57 (95% CI = 0.56-0.58) in the validation sample, with variation between centers. Positive and negative predictive values for the optimal cut-off value of ≥ 200 points were 9% and 96%, respectively. CONCLUSION The present risk score confidently excluded a large proportion of individuals from being at any appreciable risk to develop SWG within the next 5 years. Future studies, however, may attempt to further refine the positive prediction of the score. Yes
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- 2013
27. Risks of misinterpretation of biomarker measurements in spot urine adjusted for creatinine - A problem especially for studies comparing plant based with omnivorous diets.
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Abraham K, Penczynski K, Monien BH, Bergau N, Knüppel S, and Weikert C
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- Animals, Humans, Creatinine, Vegans, Biomarkers, Diet, Vegetarian, Diet
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Biomarker measurements in spot urine are often adjusted for creatinine to control for dilution resulting from individual hydration. We here report on results of a study involving age- and sex-matched vegans and omnivores (n = 36 each). The daily urinary excretion of 2,3-dihydroxypropylmercapturic acid (DHPMA, a diet-independent endogenous C3-metabolite used as an example compound) was found not to be different in vegans and omnivores (median 433 μg/24 h each), however, creatinine-adjusted levels were 26% lower in omnivores (median 285 μg/g creatinine) than in vegans (median 383 μg/g creatinine, p = 0.003). This difference results from the higher urinary excretion of creatinine in the omnivores compared to vegans (median 1.51 vs. 1.21 g/24 h, p = 0.009). Linear regression showed - besides the fat-free mass - a significant impact of the factor diet (vegans vs. omnivores). This may be due to the consumption of meat and fish as exogenous sources of creatinine. A literature search revealed broad evidence for this interpretation, as creatinine is formed from creatine during heating of meat and fish. Accordingly, consumption leads to temporary increase of serum/plasma creatinine and urinary creatinine excretion, resulting in higher levels in omnivores compared to vegans/vegetarians. An adjustment of the urinary DHPMA concentrations using specific gravity revealed 13% lower values in omnivores (median 225 μg/L) than in vegans (median 260 μg/L, p = 0.07). Compared to creatinine-adjustment, adjustment for specific gravity introduces a smaller but still obvious difference between omnivores and vegans. Especially with respect to future studies comparing vegans, vegetarians and omnivores, researchers should be aware of the risks of severe misinterpretations if biomarker measurements in spot urine are adjusted for creatinine., Competing Interests: Declaration of competing interest The authors declare that they have no conflict of interest to this work., (Copyright © 2023 The Authors. Published by Elsevier GmbH.. All rights reserved.)
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- 2023
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28. Data-Driven Approach toward Long-Term Equipment Condition Assessment in Sterile Drug Product Manufacturing.
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Zürcher P, Badr S, Knüppel S, and Sugiyama H
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A two-stage data-driven methodology for long-term equipment condition assessment in drug product manufacturing is presented with a case study for a commercially operating aseptic filling line. The methodology leverages process monitoring data. Sensor measurements are partitioned using process information and maintenance schedules that are available on different databases. Data is processed to tackle heterogeneity in sources and formats. The data is cleaned to remove the effects of short-term variabilities and to enhance underlying long-term trends. Two approaches are presented for data analysis: first, anomaly detection using independent component analysis (ICA), where clusters of outliers are identified. The frequency and timing of such outliers yield important insights regarding maintenance schedules and actions. The second approach enables condition monitoring using principal component analysis (PCA). Long-term operational baselines are identified and shifts therein are linked with different process and equipment faults. This approach highlights the impact of equipment deterioration on shifting operational data baselines and shows the potential for the combined application of ICA and PCA for equipment condition monitoring. It can be applied within predictive maintenance applications where the installation of new specialized sensors is difficult, like in the pharmaceutical industry., Competing Interests: The authors declare no competing financial interest., (© 2022 The Authors. Published by American Chemical Society.)
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- 2022
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29. Quantitative allergenicity risk assessment of food products containing yellow mealworm (Tenebrio molitor).
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Garino C, Mielke H, Knüppel S, Selhorst T, Broll H, and Braeuning A
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- Animals, Food Hypersensitivity, Humans, Risk Assessment, Allergens toxicity, Food Contamination analysis, Tenebrio
- Abstract
Insect-based foods are starting to enter the EU market, raising concerns about their safety. Allergic consumers might be exposed to even a greater risk, since insects have proven to trigger allergic symptoms, particularly in patients sensitised to crustaceans. Current legislation does not enforce producers to include insects in the list of allergenic ingredients. Food allergenicity risk assessment (FARA) is still at its infancy, and the debate on the need to define allergen thresholds is open. In this paper, we aimed at applying the concepts of stochastic quantitative FARA to describe present and future scenarios of exposure to foods containing Tenebrio molitor, the yellow mealworm. According to our risk characterisation, mealworm-based food products represent a major risk for individuals allergic to crustaceans to develop symptoms after the consumption of a dose lower than a serving size. Moreover, other allergic consumers might be at risk. A correct labelling of insect containing foods would help safeguarding the health of EU allergic consumers. Quantitatively assessing the risk of allergenicity provides a clear description of the problem, facilitating the decisional process of the risk manager, supporting the implementation of effective allergen management procedures and limiting the phenomenon of uninformative precautionary labelling., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier Ltd. All rights reserved.)
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- 2020
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30. Design and characterization of dietary assessment in the German National Cohort.
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Knüppel S, Clemens M, Conrad J, Gastell S, Michels KB, Leitzmann M, Krist L, Pischon T, Krause G, Ahrens W, Ebert N, Jöckel KH, Kluttig A, Obi N, Kaaks R, Lieb W, Schipf S, Brenner H, Heuer T, Harttig U, Linseisen J, Nöthlings U, and Boeing H
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- Adult, Cohort Studies, Diet Records, Female, Germany epidemiology, Humans, Male, Middle Aged, Nutrition Assessment, Research Design, Diet statistics & numerical data, Nutrition Surveys methods
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Background/objectives: The aim of the study was to describe a novel dietary assessment strategy based on two instruments complemented by information from an external population applied to estimate usual food intake in the large-scale multicenter German National Cohort (GNC). As proof of concept, we applied the assessment strategy to data from a pretest study (2012-2013) to assess the feasibility of the novel assessment strategy., Subjects/methods: First, the consumption probability for each individual was modeled using three 24 h food lists (24h-FLs) and frequencies from one food frequency questionnaire (FFQ). Second, daily consumed food amounts were estimated from the representative German National Nutrition Survey II (NVS II) taking the characteristics of the participants into account. Usual food intake was estimated using the product of consumption probability and amounts., Results: We estimated usual intake of 41 food groups in 318 men and 377 women. The participation proportion was 100, 84.4, and 68.5% for the first, second, and third 24h-FL, respectively. We observed no associations between the probability of participating and lifestyle factors. The estimated distributions of usual food intakes were plausible and total energy was estimated to be 2707 kcal/day for men and 2103 kcal/day for women. The estimated consumption frequencies did not differ substantially between men and women with only few exceptions. The differences in energy intake between men and women were mostly due to differences in estimated daily amounts., Conclusions: The combination of repeated 24h-FLs, a FFQ, and consumption-day amounts from a reference population represents a user-friendly dietary assessment approach having generated plausible, but not yet validated, food intake values in the pretest study.
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- 2019
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31. Associations of food groups and cardiometabolic and inflammatory biomarkers: does the meal matter?
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Schwedhelm C, Schwingshackl L, Agogo GO, Sonestedt E, Boeing H, and Knüppel S
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- Adult, Aged, Aged, 80 and over, Biomarkers metabolism, Cross-Sectional Studies, Edible Grain, Female, Fruit, Humans, Male, Meals, Meat Products, Middle Aged, Prospective Studies, Vegetables, Diet, Food, Inflammation metabolism
- Abstract
Increased attention has been paid to circadian patterns and how predisposition to metabolic disorders can be affected by meal timing. Currently, it is not clear which role can be attributed to the foods selected at meals. On a cross-sectional sub-cohort study (815 adults) within the European Prospective Investigation into Cancer and Nutrition-Potsdam study, we investigated whether the same foods (vegetables, fruits, refined grains, whole grains, red and processed meats) eaten at different meals (breakfast, lunch or dinner) show different associations with biomarkers of cardiometabolic risk. Meal-specific usual intakes were calculated from multiple 24-h dietary recalls. Multivariable-adjusted linear regression models showed that intake of vegetables at breakfast was associated with lower LDL-cholesterol (-0·37 mmol/l per 50 g; 95 % CI -0·61, -0·12) and vegetables at dinner was associated with higher HDL-cholesterol (0·05 mmol/l per 50 g; 95 % CI 0, 0·10). Fruit intake at breakfast was associated with lower glycated Hb (HbA1c) (-0·06 % per 50 g; 95 % CI -0·10, -0·01) and fruits at dinner with lower C-reactive protein (CRP) (-0·21 mg/l per 50 g; 95 % CI -0·42, -0·01). Red and processed meat intake at breakfast was associated with higher HbA1c (0·25 % per 50 g; 95 % CI 0·05, 0·46) and CRP (0·76 mg/l per 50 g; 95 % CI 0·15, 1·36). Our results suggest that by preferring fruits and vegetables and avoiding red and processed meats at specific meals (i.e. breakfast and dinner), cardiometabolic profiles and ultimately chronic disease risk could be improved. Lunch seemed to be a less important meal in terms of food-biomarker associations.
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- 2019
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32. Usual Dietary Intake Estimation Based on a Combination of Repeated 24-H Food Lists and a Food Frequency Questionnaire in the KORA FF4 Cross-Sectional Study.
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Mitry P, Wawro N, Six-Merker J, Zoller D, Jourdan C, Meisinger C, Thierry S, Nöthlings U, Knüppel S, Boeing H, and Linseisen J
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Background: Estimation of usual dietary intake poses a challenge in epidemiological studies. We applied a blended approach that combines the strengths provided by repeated 24-h food lists (24HFLs) and a food frequency questionnaire (FFQ). Methods: At least two web-based 24HFLs and one FFQ were completed by 821 participants in the KORA FF4 study. Consumption probabilities were estimated using logistic mixed models, adjusting for covariates and the FFQ data on consumption frequency. Intake amount of a consumed food item was predicted for each participant based on the results of the second Bavarian Food Consumption Survey (BVS II). By combining consumption probability and estimated consumption amount, the usual food intake for each participant was estimated. These results were compared to results obtained without considering FFQ information for consumption probability estimation, as well as to conventional FFQ data. Results: The results of the blended approach for food group intake were often higher than the FFQ-based results. Intraclass correlation coefficients between both methods ranged between 0.21 and 0.86. Comparison of both methods resulted in weighted kappa values based on quintiles ranging from fair (0.34) to excellent agreement (0.84). Omission of FFQ information in the consumption probability models distinctly affected the results at the group level, though individual intake data were slightly affected, for the most part. Conclusions: Usual dietary intake data based on the blended approach differs from the FFQ-based results both in absolute terms and in classification according to quintiles. The application of the blended approach has been demonstrated as a possible tool in nutritional epidemiology, as a comparison with published studies showed that the blended approach yields reasonable estimates. The inclusion of the FFQ information is valuable especially with regard to irregularly consumed foods. A validation study including biomarkers of dietary intake is warranted.
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- 2019
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33. Is a Single 24-hour Dietary Recall per Person Sufficient to Estimate the Population Distribution of Usual Dietary Intake?
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Knüppel S, Norman K, and Boeing H
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- Demography, Food, Nutrients, Diet, Energy Intake
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- 2019
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34. Intake of 12 food groups and disability-adjusted life years from coronary heart disease, stroke, type 2 diabetes, and colorectal cancer in 16 European countries.
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Schwingshackl L, Knüppel S, Michels N, Schwedhelm C, Hoffmann G, Iqbal K, De Henauw S, Boeing H, and Devleesschauwer B
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- Colorectal Neoplasms epidemiology, Colorectal Neoplasms prevention & control, Coronary Disease epidemiology, Coronary Disease prevention & control, Diabetes Mellitus, Type 2 epidemiology, Diabetes Mellitus, Type 2 prevention & control, Disabled Persons, Europe epidemiology, Fruit, Humans, Life Expectancy, Population Health, Risk Factors, Risk Reduction Behavior, Stroke epidemiology, Stroke prevention & control, Vegetables, Whole Grains, Colorectal Neoplasms etiology, Coronary Disease etiology, Diabetes Mellitus, Type 2 etiology, Eating physiology, Food adverse effects, Quality-Adjusted Life Years, Stroke etiology
- Abstract
Our aim was to estimate and rank 12 food groups according to disability-adjusted life years (DALYs) from coronary heart disease (CHD), stroke, type 2 diabetes (T2D), and colorectal cancer (CRC) in 16 European countries. De novo published non-linear dose-response meta-analyses of prospective studies (based on 297 primary reports), and food consumption data from the European Food Safety Authority Comprehensive European Food Consumption Database in Exposure Assessment, and DALY estimates from the Institute for Health Metrics and Evaluation were used. By implementing disease-specific counterfactual scenarios of theoretical minimum risk exposure level (TMRELs), the proportion of DALYs attributed to 12 food groups was estimated. In addition, a novel modelling approach was developed to obtain a single (optimized) TMREL across diseases. Four scenarios were analysed (A: disease-specific TMRELs/all food-disease associations; B: disease-specific TMRELs/only significant food-disease associations; C: single TMREL/all food-disease associations; D: single TMREL/only significant food-disease associations). Suboptimal food intake was associated with the following proportions of DALYs; Scenario A (highest-estimate) and D (lowest-estimate): CHD (A: 67%, D: 52%), stroke (A: 49%, D: 30%), T2D (A: 57%, D: 51%), and CRC (A: 54%, D: 40%). Whole grains (10%) had the highest impact on DALYs, followed by nuts (7.1%), processed meat (6.4%), fruit (4.4%) and fish and legumes (4.2%) when combining all scenarios. The contribution to total DALYs of all food groups combined in the different scenarios ranged from 41-52% in Austria to 51-69% in the Czech-Republic. These findings could have important implications for planning future food-based dietary guidelines as a public health nutrition strategy.
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- 2019
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35. Gaussian graphical models identified food intake networks and risk of type 2 diabetes, CVD, and cancer in the EPIC-Potsdam study.
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Iqbal K, Schwingshackl L, Floegel A, Schwedhelm C, Stelmach-Mardas M, Wittenbecher C, Galbete C, Knüppel S, Schulze MB, and Boeing H
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- Adult, Biomarkers blood, Cardiovascular Diseases blood, Cohort Studies, Cross-Sectional Studies, Diabetes Mellitus, Type 2 blood, Europe, Female, Germany epidemiology, Humans, Male, Middle Aged, Neoplasms blood, Proportional Hazards Models, Prospective Studies, Risk Factors, Cardiovascular Diseases epidemiology, Diabetes Mellitus, Type 2 epidemiology, Diet methods, Models, Statistical, Neoplasms epidemiology
- Abstract
Purpose: The aim of the study was to investigate the association between the previously identified Gaussian graphical models' (GGM) food intake networks and risk of major chronic diseases as well as intermediate biomarkers in the European Prospective Investigation into Cancer and nutrition (EPIC)-Potsdam cohort., Methods: In this cohort analysis of 10,880 men and 13,340 women, adherence to the previously identified sex-specific GGM networks as well as principal component analysis identified patterns was investigated in relation to risk of major chronic diseases, using Cox-proportional hazard models. Associations of the patterns with intermediate biomarkers were cross-sectionally analyzed using multiple linear regressions., Results: Results showed that higher adherence to the GGM Western-type pattern was associated with increased risk (Hazard Ratio: 1.55; 95% CI 1.13-2.15; P trend = 0.004) of type 2 diabetes (T2D) in women, whereas adherence to a high-fat dairy (HFD) pattern was associated with lower risk of T2D both in men (0.69; 95% CI 0.54-0.89; P trend < 0.001) and women (0.71; 95% CI: 0.53, 0.96; P trend = 0.09). Among PCA patterns, HFD pattern was associated with lower risk of T2D (0.74; 95% CI 0.58-0.95; P trend < 0.001) in men and bread and sausage pattern was associated with higher risk of T2D (1.79; 95% CI 1.29-2.48; P trend < 0.001) in women. Moreover, The GGM-HFD pattern was positively associated with HDL-C in men and inversely associated with C-reactive protein in women., Conclusion: Overall, these results show that GGM-identified networks reflect dietary patterns, which could also be related to risk of chronic diseases.
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- 2019
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36. Correction to: Meal analysis for understanding eating behavior: meal- and participant-specific predictors for the variance in energy and macronutrient intake.
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Schwedhelm C, Iqbal K, Schwingshackl L, Agogo GO, Boeing H, and Knüppel S
- Abstract
Following publication of the original article [1], the authors reported an error in Table 3. The correct Table 3 is provided below.
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- 2019
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37. Malnutrition predicts long-term survival in hospitalized patients with gastroenterological and hepatological diseases.
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Knappe-Drzikova B, Maasberg S, Vonderbeck D, Krafft TA, Knüppel S, Sturm A, Müller-Nordhorn J, Wiedenmann B, and Pape UF
- Subjects
- Adult, Aged, Aged, 80 and over, Anthropometry, Electric Impedance therapeutic use, Female, Gastrointestinal Diseases mortality, Gastrointestinal Diseases therapy, Germany epidemiology, Humans, Liver Diseases mortality, Liver Diseases therapy, Male, Middle Aged, Nutrition Assessment, Prognosis, Prospective Studies, Survival Analysis, Transferrin metabolism, Young Adult, Gastrointestinal Diseases physiopathology, Hospitalization, Liver Diseases physiopathology, Malnutrition mortality, Malnutrition physiopathology, Nutritional Status
- Abstract
Background & Aims: Malnutrition is a common problem in hospitalized patients, influencing treatment outcomes, length of hospital stay, quality of life and overall survival. However, the association of nutritional status parameters with long-term mortality has not yet been studied systematically in gastroenterological-hepatological patients. The present study aimed to assess the association between nutritional status parameters as characterized by Nutritional Risk Screening (NRS), anthropometry, serum transferrin, bioelectrical impedance analysis (BIA) and long-term overall survival in hospitalized gastroenterological-hepatological patients., Methods: Nutritional status was assessed in 644 gastroenterological-hepatological patients by NRS score. In addition, body mass index (BMI) and serum transferrin were determined and BIA was performed. Mid-upper arm circumference (MUAC) and triceps skinfold thickness (TST) were measured. Patients were followed for a mean period of 67 months (mean 54.8, range 0-107 months)., Results: During malnutrition screening, 475 (73.8%) patients were diagnosed as sufficiently nourished by NRS (NRS 0-2), while an increased risk of malnutrition was found in 169 (26.2%) patients (NRS≤3). Malnutrition was significantly associated with less favourable results for BMI (p < 0.001), serum transferrin (p < 0.001), BIA (p < 0.001), MUAC (p < 0.001) and TST (p < 0.05). Overall 5-year survival rates (YSR) were much shorter in malnourished patients whether with (5-YSR: 43.9%) or without (73.6%) malignancy. Overall 5-year survival rates (YSR) were much shorter in malnourished patients whether with (5-YSR: 43.9%) or without (73.6%) malignancy. By the multivariable analysis the NRS ≥3 and, phase angle (PhA) over the 5th percentile or over the mean of the cohort were found to be associated with long-term survival., Conclusions: Malnutrition is highly prevalent in hospitalized gastroenterological-hepatological patients and is associated with distinct clinical diagnoses. In the present study we demonstrated that malnutrition characterized by the NRS, anthropometry, serum transferrin and BIA, not only predicts short-term but also significantly poor long-term outcome in these patients., (Copyright © 2019 European Society for Clinical Nutrition and Metabolism. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2019
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38. Meal analysis for understanding eating behavior: meal- and participant-specific predictors for the variance in energy and macronutrient intake.
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Schwedhelm C, Iqbal K, Schwingshackl L, Agogo GO, Boeing H, and Knüppel S
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- Aged, Aged, 80 and over, Body Mass Index, Dietary Carbohydrates administration & dosage, Dietary Fats administration & dosage, Dietary Proteins administration & dosage, Female, Germany, Humans, Male, Meals, Middle Aged, Sex Factors, Diet, Energy Intake, Feeding Behavior, Nutrients administration & dosage
- Abstract
Background: Meals differ in their nutritional content. This variation has not been fully addressed despite its potential contribution in understanding eating behavior. The aim of this study was to investigate the between-meal and between-individual variance in energy and macronutrient intake as a measure of variation in intake and the meal type-specific relative importance of predictors of these intake variations., Methods: Energy and macronutrient intake were derived from three 24 h dietary recalls in an EPIC-Potsdam sub-cohort of 814 German adults. Intra-class correlation was calculated for participants and meal type. Predictors of intake were assessed using meal type-specific multilevel regression models in a structural equation modeling framework at intake and participant levels using the Pratt Index. The importance of the predictor energy misreporting was assessed in sensitivity analyses on 682 participants. 95% confidence intervals were calculated based on 1000 bootstrap samples., Results: Differences between meal types explain a large proportion of the variation in intake (intra-class correlation: 39% for energy, 25% for carbohydrates, 47% for protein, and 33% for fat). Between-participant variation in intake was much lower, with a maximum of 3% for carbohydrate and fat. Place of meal was the most important intake-level predictor of energy and macronutrient intake (Pratt Index of up to 65%). Week/weekend day was important in the breakfast meal, and prior interval (hours passed since last meal) was important for the afternoon snack and dinner. On the participant level, sex was the most important predictor, with Pratt Index of up to 95 and 59% in the main and in the sensitivity analysis, respectively. Energy misreporting was especially important at the afternoon snack, accounting for up to 69% of the explained variance., Conclusions: The meal type explains the highest variation in energy and macronutrient intakes. We identified key predictors of variation in the intake and in the participant levels. These findings suggest that successful dietary modification efforts should focus on improving specific meals.
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- 2019
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39. Traditional risk factors for essential hypertension: analysis of their specific combinations in the EPIC-Potsdam cohort.
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Andriolo V, Dietrich S, Knüppel S, Bernigau W, and Boeing H
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- Adiposity, Adult, Aged, Cohort Studies, Diet, Exercise, Female, Humans, Life Style, Male, Middle Aged, Neoplasms epidemiology, Nutrition Assessment, Obesity epidemiology, Obesity, Abdominal, Prevalence, Proportional Hazards Models, Prospective Studies, Risk Factors, Risk Reduction Behavior, Smoking epidemiology, White People, Essential Hypertension epidemiology, Hypertension epidemiology, Hypertension etiology
- Abstract
Appropriate interventions might improve the prevention of essential hypertension. This requires a comprehensive view of modifiable lifestyle factors (MLFs) distribution and effect. To determine how six MLFs (general adiposity, abdominal adiposity, alcohol consumption, smoking, diet, physical inactivity) for risk of hypertension are distributed and how their combinations affect the risk, a prospective study cohort of 11,923 healthy participants from the population-based European Prospective Investigation into Cancer and Nutrition (EPIC)-Potsdam Study was used. Of these, 1,635 developed hypertension during a mean follow-up of 10.3 years. Mutually exclusive combinations, clustering and interactions of MLFs were then investigated stratifying by sex, Hazard Ratios (HRs) and Population Attributable Risks (PARs%) were calculated. General adiposity alone was sufficient to increase the risk of hypertension (HR = 1.86, PAR% 3.36), and in this cohort it played a major role in enhancing the risk of hypertension, together with smoking and physical inactivity. MLFs had a different impact and a different modulation of risk in women and men, and they showed a remarkable tendency to occur in specific patterns with higher prevalence than expected. This indication can help to promote a holistic approach through multifactorial preventive strategies addressing more than a factor at a time. For prevention of hypertension addressing adiposity together with smoking, promoting at the same time physical activity should be the first choice.
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- 2019
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40. Food groups and risk of coronary heart disease, stroke and heart failure: A systematic review and dose-response meta-analysis of prospective studies.
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Bechthold A, Boeing H, Schwedhelm C, Hoffmann G, Knüppel S, Iqbal K, De Henauw S, Michels N, Devleesschauwer B, Schlesinger S, and Schwingshackl L
- Subjects
- Beverages, Coronary Disease prevention & control, Databases, Factual, Eggs, Feeding Behavior, Fruit, Heart Failure prevention & control, Humans, Nuts, Prospective Studies, Red Meat, Risk Factors, Risk Reduction Behavior, Seafood, Stroke prevention & control, Vegetables, Whole Grains, Coronary Disease etiology, Diet adverse effects, Heart Failure etiology, Stroke etiology
- Abstract
Background: Despite growing evidence for food-based dietary patterns' potential to reduce cardiovascular disease risk, knowledge about the amounts of food associated with the greatest change in risk of specific cardiovascular outcomes and about the quality of meta-evidence is limited. Therefore, the aim of this meta-analysis was to synthesize the knowledge about the relation between intake of 12 major food groups (whole grains, refined grains, vegetables, fruits, nuts, legumes, eggs, dairy, fish, red meat, processed meat, and sugar-sweetened beverages [SSB]) and the risk of coronary heart disease (CHD), stroke and heart failure (HF)., Methods: We conducted a systematic search in PubMed and Embase up to March 2017 for prospective studies. Summary risk ratios (RRs) and 95% confidence intervals (95% CI) were estimated using a random effects model for highest versus lowest intake categories, as well as for linear and non-linear relationships., Results: Overall, 123 reports were included in the meta-analyses. An inverse association was present for whole grains (RR
CHD : 0.95 (95% CI: 0.92-0.98), RRHF : 0.96 (0.95-0.97)), vegetables and fruits (RRCHD : 0.97 (0.96-0.99), and 0.94 (0.90-0.97); RRstroke : 0.92 (0.86-0.98), and 0.90 (0.84-0.97)), nuts (RRCHD : 0.67 (0.43-1.05)), and fish consumption (RRCHD : 0.88 (0.79-0.99), RRstroke : 0.86 (0.75-0.99), and RRHF : 0.80 (0.67-0.95)), while a positive association was present for egg (RRHF : 1.16 (1.03-1.31)), red meat (RRCHD : 1.15 (1.08-1.23), RRstroke : 1.12 (1.06-1.17), RRHF : 1.08 (1.02-1.14)), processed meat (RRCHD : 1.27 (1.09-1.49), RRstroke : 1.17 (1.02-1.34), RRHF : 1.12 (1.05-1.19)), and SSB consumption (RRCHD : 1.17 (1.11-1.23), RRstroke : 1.07 (1.02-1.12), RRHF : 1.08 (1.05-1.12)) in the linear dose-response meta-analysis. There were clear indications for non-linear dose-response relationships between whole grains, fruits, nuts, dairy, and red meat and CHD., Conclusion: An optimal intake of whole grains, vegetables, fruits, nuts, legumes, dairy, fish, red and processed meat, eggs and SSB showed an important lower risk of CHD, stroke, and HF.- Published
- 2019
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41. Generating the evidence for risk reduction: a contribution to the future of food-based dietary guidelines.
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Schwingshackl L, Schlesinger S, Devleesschauwer B, Hoffmann G, Bechthold A, Schwedhelm C, Iqbal K, Knüppel S, and Boeing H
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- Humans, Primary Prevention, Quality-Adjusted Life Years, Research Design, Diet, Feeding Behavior, Food classification, Health Promotion, Meta-Analysis as Topic, Nutrition Policy
- Abstract
A major advantage of analyses on the food group level is that the results are better interpretable compared with nutrients or complex dietary patterns. Such results are also easier to transfer into recommendations on primary prevention of non-communicable diseases. As a consequence, food-based dietary guidelines (FBDG) are now the preferred approach to guide the population regarding their dietary habits. However, such guidelines should be based on a high grade of evidence as requested in many other areas of public health practice. The most straightforward approach to generate evidence is meta-analysing published data based on a careful definition of the research question. Explicit definitions of study questions should include participants, interventions/exposure, comparisons, outcomes and study design. Such type of meta-analyses should not only focus on categorical comparisons, but also on linear and non-linear dose-response associations. Risk of bias of the individual studies of the meta-analysis should be assessed, rated and the overall credibility of the results scored (e.g. using NutriGrade). Tools such as a measurement tool to assess systematic reviews or ROBIS are available to evaluate the methodological quality/risk of bias of meta-analyses. To further evaluate the complete picture of evidence, we propose conducting network meta-analyses (NMA) of intervention trials, mostly on intermediate disease markers. To rank food groups according to their impact, disability-adjusted life years can be used for the various clinical outcomes and the overall results can be compared across the food groups. For future FBDG, we recommend to implement evidence from pairwise and NMA and to quantify the health impact of diet-disease relationships.
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- 2018
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42. Effects of oils and solid fats on blood lipids: a systematic review and network meta-analysis.
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Schwingshackl L, Bogensberger B, Benčič A, Knüppel S, Boeing H, and Hoffmann G
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- Animals, Humans, Randomized Controlled Trials as Topic, Dietary Fats, Unsaturated pharmacology, Lipids blood
- Abstract
The aim of this network meta-analysis (NMA) is to compare the effects of different oils/solid fats on blood lipids. Literature searches were performed until March 2018. Inclusion criteria were as follows: i ) randomized trial (3 weeks study length) comparing at least two of the following oils/solid fats: safflower, sunflower, rapeseed, hempseed, flaxseed, corn, olive, soybean, palm, and coconut oil, and lard, beef-fat, and butter; ii ) outcomes LDL-cholesterol (LDL-C), total cholesterol (TC), HDL-cholesterol (HDL-C), and triacylglycerols (TGs). A random dose-response (per 10% isocaloric exchange) NMA was performed and surface under the cumulative ranking curve (SUCRA) was estimated. Fifty-four trials were included in the NMA. Safflower oil had the highest SUCRA value for LDL-C (82%) and TC (90%), followed by rapeseed oil (76% for LDL-C, 85% for TC); whereas, palm oil (74%) had the highest SUCRA value for TG, and coconut oil (88%) for HDL-C. Safflower, sunflower, rapeseed, flaxseed, corn, olive, soybean, palm, and coconut oil as well beef fat were more effective in reducing LDL-C (-0.42 to -0.23 mmol/l) as compared with butter. Despite limitations in these data, our NMA findings are in line with existing evidence on the metabolic effects of fat and support current recommendations to replace high saturated-fat food with unsaturated oils., (Copyright © 2018 Schwingshackl et al.)
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- 2018
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43. Meal and habitual dietary networks identified through Semiparametric Gaussian Copula Graphical Models in a German adult population.
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Schwedhelm C, Knüppel S, Schwingshackl L, Boeing H, and Iqbal K
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- Adult, Aged, Eating, Female, Germany, Humans, Male, Normal Distribution, Nutrition Surveys, Snacks, Diet statistics & numerical data, Habits, Meals, Models, Statistical
- Abstract
Gaussian graphical models (GGMs) are exploratory methods that can be applied to construct networks of food intake. Such networks were constructed for meal-structured data, elucidating how foods are consumed in relation to each other at meal level. Meal-specific networks were compared with habitual dietary networks using data from an EPIC-Potsdam sub-cohort study. Three 24-hour dietary recalls were collected cross-sectionally from 815 adults in 2010-2012. Food intake was averaged to obtain the habitual intake. GGMs were applied to four main meals and habitual intakes of 39 food groups to generate meal-specific and habitual dietary networks, respectively. Communities and centrality were detected in the dietary networks to facilitate interpretation. The breakfast network revealed five communities of food groups with other vegetables, sauces, bread, margarine, and sugar & confectionery as central food groups. The lunch and afternoon snacks networks showed higher variability in food consumption and six communities were detected in each of these meal networks. Among the central food groups detected in both of these meal networks were potatoes, red meat, other vegetables, and bread. Two dinner networks were identified with five communities and other vegetables as a central food group. Partial correlations at meals were stronger than on the habitual level. The meal-specific dietary networks were only partly reflected in the habitual dietary network with a decreasing percentage: 64.3% for dinner, 50.0% for breakfast, 36.2% for lunch, and 33.3% for afternoon snack. The method of GGM yielded dietary networks that describe combinations of foods at the respective meals. Analysing food consumption on the habitual level did not exactly reflect meal level intake. Therefore, interpretation of habitual networks should be done carefully. Meal networks can help understand dietary habits, however, GGMs warrant validation in other populations., Competing Interests: The authors have declared that no competing interests exist.
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- 2018
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44. The NutriAct Family Study: a web-based prospective study on the epidemiological, psychological and sociological basis of food choice.
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Schwingshackl L, Ruzanska U, Anton V, Wallroth R, Ohla K, Knüppel S, Schulze MB, Pischon T, Deutschbein J, Schenk L, Warschburger P, Harttig U, Boeing H, and Bergmann MM
- Subjects
- Aged, Epidemiologic Research Design, Female, Humans, Internet, Male, Middle Aged, Prospective Studies, Surveys and Questionnaires, Diet psychology, Eating psychology, Food Preferences psychology, Siblings psychology, Spouses psychology
- Abstract
Background: Most studies on food choice have been focussing on the individual level but familial aspects may also play an important role. This paper reports of a novel study that will focus on the familial aspects of the formation of food choice among men and women aged 50-70 years by recruiting spouses and siblings (NutriAct Family Study; NFS)., Methods: Data is collected prospectively via repeatedly applied web-based questionnaires over the next years. The recruitment for the NFS started in October 2016. Participants are recruited based on an index person who is actively participating in the European Prospective Investigation into Cancer and Nutrition (EPIC)-Potsdam study. This index person was asked to invite the spouse, a sibling or an in-law. If a set of family members agreed to participate, access to individualized web-based questionnaires assessing dietary intake, other health related lifestyle habits, eating behaviour, food responsiveness, personality, self-regulation, socio-economic status and socio-cultural values was provided. In the first phase of the NSF, recruitment rates were monitored in detail and participants' comments were analysed in order to improve the feasibility of procedures and instruments., Discussion: Until August 4th 2017, 4783 EPIC-Participants were contacted by mail of which 446 persons recruited 2 to 5 family members (including themselves) resulting in 1032 participants, of whom 82% had started answering or already completed the questionnaires. Of the 4337 remaining EPIC-participants who had been contacted, 1040 (24%) did not respond at all, and 3297 (76%) responded but declined, in 51% of the cases because of the request to recruit at least 2 family members in the respective age range. The developed recruitment procedures and web-based methods of data collection are capable to generate the required study population including the data on individual and inter-personal determinants which will be linkable to food choice. The information on familial links among the study participants will show the role of familial traits in midlife for the adoption of food choices supporting healthy aging.
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- 2018
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45. Food groups and risk of colorectal cancer.
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Schwingshackl L, Schwedhelm C, Hoffmann G, Knüppel S, Laure Preterre A, Iqbal K, Bechthold A, De Henauw S, Michels N, Devleesschauwer B, Boeing H, and Schlesinger S
- Subjects
- Case-Control Studies, Cohort Studies, Humans, Colorectal Neoplasms epidemiology, Diet statistics & numerical data
- Abstract
The aim of this systematic review and meta-analysis was to summarize the evidence on the relationship between intake of 12 major food groups, including whole grains, refined grains, vegetables, fruit, nuts, legumes, eggs, dairy, fish, red meat, processed meat and sugar-sweetened beverages with risk of colorectal cancer (CRC). We conducted a systematic search in PubMed and Embase for prospective studies investigating the association between these 12 food groups and risk of CRC until April 2017. Summary risk ratios (RRs) and 95% confidence intervals (95% CI) were estimated using a random effects model for high vs. low intake categories, as well as for linear and nonlinear relationships. An inverse association was observed for whole grains (RR
30g/d : 0.95, 95% CI 0.93, 0.97; n = 9 studies), vegetables (RR100g/d : 0.97, 95% CI 0.96, 0.98; n = 15), fruit (RR100g/d : 0.97, 95% CI 0.95, 0.99; n = 16) and dairy (RR200g/d : 0.93, 95% CI 0.91, 0.94; n = 15), while a positive association for red meat (RR100g/d : 1.12, 95% CI 1.06, 1.19; n = 21) and processed meat (RR50g/d : 1.17, 95% CI 1.10, 1.23; n = 16), was seen in the linear dose-response meta-analysis. Some evidence for nonlinear relationships was observed between vegetables, fruit and dairy and risk of colorectal cancer. Findings of this meta-analysis showed that a diet characterized by high intake of whole grains, vegetables, fruit and dairy products and low amounts of red meat and processed meat was associated with lower risk of CRC., (© 2017 UICC.)- Published
- 2018
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46. Functional relevance of radiographic spinal progression in axial spondyloarthritis: results from the GErman SPondyloarthritis Inception Cohort.
- Author
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Poddubnyy D, Listing J, Haibel H, Knüppel S, Rudwaleit M, and Sieper J
- Subjects
- Adult, Disease Progression, Female, Follow-Up Studies, Germany epidemiology, Humans, Male, Morbidity trends, ROC Curve, Severity of Illness Index, Spondylarthritis epidemiology, Spondylarthritis physiopathology, Time Factors, Radiography methods, Range of Motion, Articular physiology, Spine diagnostic imaging, Spondylarthritis diagnosis
- Abstract
Objectives: The aim of the study was to investigate the functional relevance of the development of structural damage in the spine in patients with early axial spondyloarthritis (axSpA)., Methods: Altogether, 210 patients with early axSpA (symptom duration ⩽10 years) who completed a 2-year clinical and radiographic follow-up in the GErman SPondyloarthritis Inception Cohort were included. An association between structural damage in the spine [modified Stoke AS Spine Score (mSASSS)] and functional status (the BASFI) or spinal mobility (the BASMI) was assessed in a longitudinal linear mixed model analysis; both unstandardized (β) and standardized (βstand) regression coefficients were calculated., Results: There was an association between mSASSS and BASFI: β = 0.05 (95% CI: 0.03, 0.08) and βstand = 0.20 (95% CI: 0.11, 0.59) adjusted for disease activity parameters (the BASDAI and CRP), the presence of definite radiographic sacroiliitis and sex. An association between mSASSS and BASMI was stronger: β = 0.08 (95% CI: 0.05, 0.11) and βstand = 0.41 (95% CI: 0.25, 0.57) adjusted for the same parameters. These data indicate that, over time, an increase of 20 or 12 mSASSS points would be responsible for an increase of one BASFI or one BASMI point, respectively. Disease activity (BASDAI) also showed a significant association with BASFI [β = 0.79 (95% CI: 0.71, 0.86) and βstand = 0.71 (95% CI: 0.63, 0.77)] and BASMI [β = 0.22 (95% CI: 0.15, 0.30) and βstand = 0.28 (95% CI: 0.18, 0.37)]., Conclusion: Structural damage in the spine and disease activity are both determinants of the functional status and spinal mobility in early axSpA.
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- 2018
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47. Contribution to the understanding of how principal component analysis-derived dietary patterns emerge from habitual data on food consumption.
- Author
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Schwedhelm C, Iqbal K, Knüppel S, Schwingshackl L, and Boeing H
- Subjects
- Adult, Breakfast, Cross-Sectional Studies, Female, Follow-Up Studies, Germany, Humans, Male, Meals, Mental Recall, Middle Aged, Nutrition Assessment, Prospective Studies, Surveys and Questionnaires, Diet, Health Behavior, Principal Component Analysis
- Abstract
Background: Principal component analysis (PCA) is a widely used exploratory method in epidemiology to derive dietary patterns from habitual diet. Such dietary patterns seem to originate from intakes on multiple days and eating occasions. Therefore, analyzing food intake of study populations with different levels of food consumption can provide additional insights as to how habitual dietary patterns are formed., Objective: We analyzed the food intake data of German adults in terms of the relations among food groups from three 24-h dietary recalls (24hDRs) on the habitual, single-day, and main-meal levels, and investigated the contribution of each level to the formation of PCA-derived habitual dietary patterns., Design: Three 24hDRs were collected in 2010-2012 from 816 adults for an European Prospective Investigation into Cancer and Nutrition (EPIC)-Potsdam subcohort study. We identified PCA-derived habitual dietary patterns and compared cross-sectional food consumption data in terms of correlation (Spearman), consistency (intraclass correlation coefficient), and frequency of consumption across all days and main meals. Contribution to the formation of the dietary patterns was obtained through Spearman correlation of the dietary pattern scores., Results: Among the meals, breakfast appeared to be the most consistent eating occasion within individuals. Dinner showed the strongest correlations with "Prudent" (Spearman correlation = 0.60), "Western" (Spearman correlation = 0.59), and "Traditional" (Spearman correlation = 0.60) dietary patterns identified on the habitual level, and lunch showed the strongest correlations with the "Cereals and legumes" (Spearman correlation = 0.60) habitual dietary pattern., Conclusions: Higher meal consistency was related to lower contributions to the formation of PCA-derived habitual dietary patterns. Absolute amounts of food consumption did not strongly conform to the habitual dietary patterns by meals, suggesting that these patterns are formed by complex combinations of variable food consumption across meals. Dinner showed the highest contribution to the formation of habitual dietary patterns. This study provided information about how PCA-derived dietary patterns are formed and how they could be influenced.
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- 2018
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48. Food Groups and Risk of Hypertension: A Systematic Review and Dose-Response Meta-Analysis of Prospective Studies.
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Schwingshackl L, Schwedhelm C, Hoffmann G, Knüppel S, Iqbal K, Andriolo V, Bechthold A, Schlesinger S, and Boeing H
- Subjects
- Diet methods, Fruit, Humans, Linear Models, Meat, Nutrition Policy, Nuts, Prospective Studies, Risk Factors, Vegetables, Diet adverse effects, Eating physiology, Food adverse effects, Hypertension etiology
- Abstract
The aim of this systematic review and meta-analysis was to summarize the evidence on the relation of the intakes of 12 major food groups, including whole grains, refined grains, vegetables, fruits, nuts, legumes, eggs, dairy, fish, red meat, processed meat, and sugar-sweetened beverages (SSBs) with the risk of hypertension. PubMed, Scopus, and Web of Science were searched systematically until June 2017 for prospective studies having quantitatively investigated the above-mentioned foods. We conducted meta-analysis on the highest compared with the lowest intake categories and linear and nonlinear dose-response meta-analyses to analyze the association. Summary RRs and 95% CIs were estimated by using a random-effects model. Overall, 28 reports were included in the meta-analysis. An inverse association for the risk of hypertension was observed for 30 g whole grains/d (RR: 0.92; 95% CI: 0.87, 0.98), 100 g fruits/d (RR: 0.97; 95% CI: 0.96, 0.99), 28 g nuts/d (RR: 0.70; 95% CI: 0.45, 1.08), and 200 g dairy/d (RR: 0.95; 95% CI: 0.94, 0.97), whereas a positive association for 100 g red meat/d (RR: 1.14; 95% CI: 1.02, 1.28), 50 g processed meat/d (RR: 1.12; 95% CI: 1.00, 1.26), and 250 mL SSB/d (RR: 1.07; 95% CI: 1.04, 1.10) was seen in the linear dose-response meta-analysis. Indication for nonlinear relations of the intakes of whole grains, fruits, fish, and processed meats with the risk of hypertension was detected. In summary, this comprehensive dose-response meta-analysis of 28 reports identified optimal intakes of whole grains, fruits, nuts, legumes, dairy, red and processed meats, and SSBs related to the risk of hypertension. These findings need to be seen under the light of very-low to low quality of meta-evidence. However, the findings support the current dietary guidelines in the prevention of hypertension., Competing Interests: Author disclosures: LS, CS, GH, SK, KI, VA, AB, SS, and HB, no conflicts of interest., (© 2017 American Society for Nutrition.)
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- 2017
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49. Reply to JJ Meerpohl et al.
- Author
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Schwingshackl L, Knüppel S, Schwedhelm C, Hoffmann G, Missbach B, Stelmach-Mardas M, Dietrich S, Eichelmann F, Kontopantelis E, Iqbal K, Aleksandrova K, Lorkowski S, Leitzmann MF, Kroke A, and Boeing H
- Abstract
Competing Interests: Author disclosures: LS, SK, CS, GH, BM, MS-M, SD, FE, EK, KI, KA, SL, MFL, AK, and HB, no conflicts of interest.
- Published
- 2017
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50. Food groups and risk of all-cause mortality: a systematic review and meta-analysis of prospective studies.
- Author
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Schwingshackl L, Schwedhelm C, Hoffmann G, Lampousi AM, Knüppel S, Iqbal K, Bechthold A, Schlesinger S, and Boeing H
- Subjects
- Humans, Risk Factors, Risk Reduction Behavior, Cause of Death, Diet, Feeding Behavior
- Abstract
Background: Suboptimal diet is one of the most important factors in preventing early death and disability worldwide. Objective: The aim of this meta-analysis was to synthesize the knowledge about the relation between intake of 12 major food groups, including whole grains, refined grains, vegetables, fruits, nuts, legumes, eggs, dairy, fish, red meat, processed meat, and sugar-sweetened beverages, with risk of all-cause mortality. Design: We conducted a systematic search in PubMed, Embase, and Google Scholar for prospective studies investigating the association between these 12 food groups and risk of all-cause mortality. Summary RRs and 95% CIs were estimated with the use of a random effects model for high-intake compared with low-intake categories, as well as for linear and nonlinear relations. Moreover, the risk reduction potential of foods was calculated by multiplying the RR by optimal intake values (serving category with the strongest association) for risk-reducing foods or risk-increasing foods, respectively. Results: With increasing intake (for each daily serving) of whole grains (RR: 0.92; 95% CI: 0.89, 0.95), vegetables (RR: 0.96; 95% CI: 0.95, 0.98), fruits (RR: 0.94; 95% CI: 0.92, 0.97), nuts (RR: 0.76; 95% CI: 0.69, 0.84), and fish (RR: 0.93; 95% CI: 0.88, 0.98), the risk of all-cause mortality decreased; higher intake of red meat (RR: 1.10; 95% CI: 1.04, 1.18) and processed meat (RR: 1.23; 95% CI: 1.12, 1.36) was associated with an increased risk of all-cause mortality in a linear dose-response meta-analysis. A clear indication of nonlinearity was seen for the relations between vegetables, fruits, nuts, and dairy and all-cause mortality. Optimal consumption of risk-decreasing foods results in a 56% reduction of all-cause mortality, whereas consumption of risk-increasing foods is associated with a 2-fold increased risk of all-cause mortality. Conclusion: Selecting specific optimal intakes of the investigated food groups can lead to a considerable change in the risk of premature death., (© 2017 American Society for Nutrition.)
- Published
- 2017
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