37 results on '"Kühn T"'
Search Results
2. Dioxins and dioxin-like PCBs in different fish from the river Elbe and its tributaries, Germany
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Stachel, B., Christoph, E.-H., Götz, R., Herrmann, T., Krüger, F., Kühn, T., Lay, J., Löffler, J., Päpke, O., Reincke, H., Schröter-Kermani, C., Schwartz, R., Steeg, E., Stehr, D., Uhlig, S., and Umlauf, G.
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DIOXINS , *POLYCHLORINATED dibenzofurans , *MUSCLES , *FISH physiology , *EELS , *SEBASTES marinus , *EUROPEAN chub - Abstract
In a long-term program polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) as well as dioxin-like polychlorinated biphenyls (DL-PCBs) were analyzed in the muscle tissue of eels (Anguilla anguilla), bream (Abramis brama), European chub (Leuciscus cephalus) and ide (Leuciscus idus) from the river Elbe and its tributaries Mulde and Saale. The variation of the PCDD/F and DL-PCB concentrations in all fish samples is very large, whereby the DL-PCBs predominate in comparison to the PCDD/Fs. In the eels, the concentrations (pg WHO-TEQ/g ww) for the PCDD/Fs lie in the range of 0.48–22 and for the DL-PCBs between 8.5 and 59. In the whitefish, the concentration range is 0.48–12 for the PCDD/Fs and 1.2–14 for the DL-PCBs. Statistical analysis using relative congener patterns for PCDD/Fs allow spatial correlations to be examined for sub-populations of eels and whitefish. The results are compared to the maximum levels laid down in the European Commission Regulation (EC) No. 466/2001 and the action levels of the European Commission Recommendation 2006/88/EC. Eels caught directly after the major flood in August 2002 as well as eels near Hamburg (years 1996 and 1998) show high concentration peaks. Compared to the eels whitefish is less contaminated with PCDD/Fs and DL-PCBs. [Copyright &y& Elsevier]
- Published
- 2007
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3. [Nuclear medicine procedure guideline for sentinel lymph node localization].
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Schmidt M, Hohberg M, Felcht M, Kühn T, Eichbaum M, Krause BJ, Zöphel BK, and Kotzerke J
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- Humans, Practice Guidelines as Topic, Lymphatic Metastasis diagnostic imaging, Germany, Neoplasms diagnostic imaging, Neoplasms pathology, Lymphoscintigraphy methods, Nuclear Medicine, Sentinel Lymph Node Biopsy methods, Sentinel Lymph Node diagnostic imaging, Sentinel Lymph Node pathology
- Abstract
The authors present a procedure guideline for scintigraphic detection of sentinel lymph nodes in malignant melanoma, in breast cancer, in penile and vulva tumors, in head and neck cancer, and in prostate carcinoma. Important goals of sentinel lymph node scintigraphy comprise reduction of the extent of surgery, lower postoperative morbidity and optimization of histopathological examination focussing on relevant lymph nodes. Sentinel lymph node scintigraphy itself does not diagnose tumorous lymph node involvement and is not indicated when lymph node or distant metastases have been definitely diagnosed before sentinel lymph node scintigraphy. Procedures are compiled with the aim to reliably localise sentinel lymph nodes with a high detection rate typically in early tumour stages. New aspects in this guideline are new radiopharmaceuticals such as tilmanocept and Tc-99m-PSMA and SPECT/CT allowing an easier anatomical orientation. Initial dynamic lymphoscintigraphy in breast cancer is of little significance nowadays. Radiation exposure is low so that pregnancy is not a contraindication for sentinel lymph node scintigraphy. A one-day protocol should preferentially be used. Even with high volumes of scintigraphic sentinel lymph node procedures surgeons, theatre staff and pathologists receive a radiation exposure < 1 mSv/year so that they do not require occupational radiation surveillance. Aspects of quality control were included (scintigraphy, quality control of gamma probe, 6 h SLN course for surgeons, certified breast centers, medical surveillance center)., Competing Interests: Erklärung zu finanziellen InteressenForschungsförderung erhalten: Nein; Honorar/geldwerten Vorteil für Referententätigkeit erhalten: Ja, von einer anderen Institution (Pharma- oder Medizintechnikfirma usw.); Bezahlter Berater/interner Schulungsreferent/Gehaltsempfänger: Nein; Patent/Geschäftsanteile/Aktien (Autor/Partner, Ehepartner, Kinder) an Firma (Sponsor der Veranstaltung): Nein; Patent/Geschäftsanteile/Aktien (Autor/Partner, Ehepartner, Kinder) an Firma (Nicht-Sponsor der Veranstaltung): Nein.Erklärung zu nichtfinanziellen InteressenDie Autorinnen/Autoren geben an, dass kein Interessenkonflikt besteht., (Thieme. All rights reserved.)
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- 2024
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4. Protein intake and cancer: an umbrella review of systematic reviews for the evidence-based guideline of the German Nutrition Society.
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Kühn T, Kalotai N, Amini AM, Haardt J, Lehmann A, Schmidt A, Buyken AE, Egert S, Ellinger S, Kroke A, Lorkowski S, Louis S, Schulze MB, Schwingshackl L, Siener R, Stangl GI, Watzl B, Zittermann A, and Nimptsch K
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- Humans, Germany, Risk Factors, Systematic Reviews as Topic, Dietary Proteins administration & dosage, Evidence-Based Medicine methods, Evidence-Based Medicine standards, Neoplasms epidemiology, Nutrition Policy
- Abstract
Purpose: It has been proposed that a higher habitual protein intake may increase cancer risk, possibly via upregulated insulin-like growth factor signalling. Since a systematic evaluation of human studies on protein intake and cancer risk based on a standardised assessment of systematic reviews (SRs) is lacking, we carried out an umbrella review of SRs on protein intake in relation to risks of different types of cancer., Methods: Following a pre-specified protocol (PROSPERO: CRD42018082395), we retrieved SRs on protein intake and cancer risk published before January 22th 2024, and assessed the methodological quality and outcome-specific certainty of the evidence using a modified version of AMSTAR 2 and NutriGrade, respectively. The overall certainty of evidence was rated according to predefined criteria., Results: Ten SRs were identified, of which eight included meta-analyses. Higher total protein intake was not associated with risks of breast, prostate, colorectal, ovarian, or pancreatic cancer incidence. The methodological quality of the included SRs ranged from critically low (kidney cancer), low (pancreatic, ovarian and prostate cancer) and moderate (breast and prostate cancer) to high (colorectal cancer). The outcome-specific certainty of the evidence underlying the reported findings on protein intake and cancer risk ranged from very low (pancreatic, ovarian and prostate cancer) to low (colorectal, ovarian, prostate, and breast cancer). Animal and plant protein intakes were not associated with cancer risks either at a low (breast and prostate cancer) or very low (pancreatic and prostate cancer) outcome-specific certainty of the evidence. Overall, the evidence for the lack of an association between protein intake and (i) colorectal cancer risk and (ii) breast cancer risk was rated as possible. By contrast, the evidence underlying the other reported results was rated as insufficient., Conclusion: The present findings suggest that higher total protein intake may not be associated with the risk of colorectal and breast cancer, while conclusions on protein intake in relation to risks of other types of cancer are restricted due to insufficient evidence., (© 2024. The Author(s).)
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- 2024
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5. Awareness, offer, and use of psychosocial services by breast cancer survivors in Germany: a prospective multi-centre study.
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Singer S, Janni W, Kühn T, Flock F, Felberbaum R, Schwentner L, Leinert E, Wöckel A, and Schlaiß T
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- Humans, Female, Aged, Prospective Studies, Survivors psychology, Social Support, Germany, Breast Neoplasms psychology, Cancer Survivors psychology
- Abstract
Purpose: This study examined the pattern of psychosocial care in breast cancer survivors., Methods: In a prospective study with measurements before surgery, 1 month, 8 months, and 5 years thereafter, we examined the proportion of breast cancer survivors who were aware about, had been offered and received various types of psychosocial services from psychologists, social workers, doctors, self-help groups etc. The degree of helpfulness per service among users was ascertained with Likert scales. Determinants of awareness, offer and use were investigated using binary logistic regression analyses. How the services are inter-related was tested with principal component analyses., Results: Among 456 breast cancer survivors who participated until 5 years, psychological services were known by 91%, offered to 68%, and used by 55% of patients. Social services were known by 86%, offered to 65%, and used by 51%. Women ≥ 65 years were less likely to be informed about (odds ratio (OR) 0.2) and get offers for psychosocial services (OR 0.4 for social and 0.5 for psychological services) than women < 65 years. The services rated most helpful were social services in the hospital, psychological counselling by a consultant and psychotherapy in private practices., Conclusion: These findings underline the importance of psychosocial support by physicians in addition to the "professional" mental health and social care providers. They also show that elderly women in need for support might be in danger of not being well-informed about the services available., (© 2022. The Author(s).)
- Published
- 2023
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6. Financial difficulties in breast cancer survivors with and without migration background in Germany-results from the prospective multicentre cohort study BRENDA II.
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Riccetti N, Felberbaum R, Flock F, Kühn T, Leinert E, Schwentner L, Singer S, Taylor K, Wöckel A, and Janni W
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- Female, Germany, Humans, Prospective Studies, Quality of Life, Survivors, Breast Neoplasms, Cancer Survivors
- Abstract
Purpose: We aimed to explore the trajectory of financial difficulties among breast cancer survivors in the German health system and its association with migration background., Methods: In a multicentre prospective study, breast cancer survivors were approached four times (before surgery, before and after adjuvant therapy, five years after surgery) and asked about their migration history and financial difficulties. Migrants were defined as born/resided outside Germany or having citizenship/nationality other than German. Financial difficulties were ascertained with the financial difficulties item of the European Organisation for Research and Treatment of Cancer Core Instrument (EORTC QLQ-C30) at each time-point (cut-off > 17). Financial difficulties were classified in trajectories: always (every time-point), never (no time-point), initial (first, not fourth), delayed (only fourth), and acquired (second and/or third, not first). A logistic regression was conducted with the trajectories of financial difficulties as outcome and migration background as exposure. Age, trends in partnership status, and educational level were considered as confounders., Results: Of the 363 participants included, 49% reported financial difficulties at at least one time-point. Financial difficulties were reported always by 7% of the participants, initially by 5%, delayed by 10%, and acquired by 21%. Migrants were almost four times more likely to report delayed (odds ratio [OR] = 3.7; 95% confidence interval [CI] 1.3, 10.5) or acquired (OR = 3.6; 95% CI 1.6, 8.4) financial difficulties compared to non-migrant participants., Conclusion: Survivors with a migration background are more likely to suffer from financial difficulties, especially in later stages of the follow-up. A linguistically/culturally competent active enquiry about financial difficulties and information material regarding supporting services/insurances should be considered., (© 2022. The Author(s).)
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- 2022
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7. Vascular injury biomarkers and stroke risk: A population-based study.
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Pletsch-Borba L, Grafetstätter M, Hüsing A, Johnson T, González Maldonado S, Groß ML, Kloss M, Hoffmeister M, Bugert P, Kaaks R, and Kühn T
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- Adult, Aged, Biomarkers blood, Cohort Studies, Female, Follow-Up Studies, Germany epidemiology, Humans, Male, Middle Aged, Prospective Studies, Risk Factors, Stroke diagnosis, Vascular System Injuries diagnosis, Antigens, CD blood, Cell Adhesion Molecules blood, Population Surveillance methods, Stroke blood, Stroke epidemiology, Vascular System Injuries blood, Vascular System Injuries epidemiology
- Abstract
Objective: Because little is known about associations between biomarkers of vascular injury and stroke risk, we evaluated associations between plasma concentrations of 6 novel biomarkers of vascular injury and stroke risk in a population-based study., Methods: A case-cohort subset of EPIC-Heidelberg (European Prospective Investigation for Cancer and Nutrition-Heidelberg) including incident stroke cases (n = 335) and a random subcohort (n = 2,418) was selected. Concentrations of intercellular adhesion molecule 3 (ICAM3), soluble E-selectin and P-selectin, soluble thrombomodulin (sTM), thrombopoietin, and glycoprotein IIb/IIIa were measured in baseline plasma samples. Weighted Cox regression analyses were used to assess associations between biomarker levels and stroke risk., Results: Median follow-up in the subcohort and among cases was 9.8 (range, 0.1-12.5) years and 6.2 (range, 0.01-12.1) years, respectively. ICAM3 levels were associated with increased risk of incident stroke after multivariable adjustment (hazard ratio, highest vs lowest quartile: 1.64 [95% confidence interval, 1.15-2.32]; p
linear trend < 0.001). This association was more apparent for ischemic (1.65 [1.12-2.45]; plinear trend < 0.01) than for hemorrhagic stroke (1.29 [0.60-2.78]; plinear trend = 0.3). We further observed a borderline significant trend for a positive association between sTM and overall stroke risk (1.47 [0.99-2.19]; plinear trend = 0.05)., Conclusions: In this population-based study, circulating levels of ICAM3, an adhesion molecule shed by leukocytes, were associated with increased risk of incident stroke. Further mechanistic studies are needed to elucidate the pathophysiology underlying this association., Classification of Evidence: This study provides Class II evidence that plasma levels of ICAM3 are associated with increased stroke risk., (© 2020 American Academy of Neurology.)- Published
- 2020
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8. Dietary Factors in Relation to Liver Fat Content: A Cross-sectional Study.
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Watzinger C, Nonnenmacher T, Grafetstätter M, Sowah SA, Ulrich CM, Kauczor HU, Kaaks R, Schübel R, Nattenmüller J, and Kühn T
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- Adult, Biomarkers, Body Weights and Measures, Cross-Sectional Studies, Female, Germany epidemiology, Humans, Liver diagnostic imaging, Male, Middle Aged, Non-alcoholic Fatty Liver Disease epidemiology, Non-alcoholic Fatty Liver Disease etiology, Non-alcoholic Fatty Liver Disease metabolism, Non-alcoholic Fatty Liver Disease pathology, Public Health Surveillance, Diet, Disease Susceptibility, Liver metabolism, Liver pathology
- Abstract
Non-alcoholic fatty liver disease (NAFLD) can lead to functional liver impairment and severe comorbidities. Beyond energy balance, several dietary factors may increase NAFLD risk, but human studies are lacking. The aim of this cross-sectional study was to investigate the associations between food consumption (47 food groups, derived Mediterranean and Dietary Approaches to Stop Hypertension (DASH) diet quality scores) and liver fat content (continuous scale and NAFLD, i.e., >5% liver fat content). Liver fat content was measured by magnetic resonance imaging (MRI) in 136 individuals (BMI: 25-40 kg/m
2 , age: 35-65, 50.7% women) and food intake was recorded by food frequency questionnaires (FFQs). Associations between food items and liver fat were evaluated by multi-variable regression models. Intakes of cake and cookies as well legumes were inversely associated with liver fat content, while positive associations with intakes of high-fat dairy and cheese were observed. Only cake and cookie intake also showed an inverse association with NAFLD. This inverse association was unexpected, but not affected by adjustment for reporting bias. Both diet quality scores were inversely associated with liver fat content and NAFLD. Thus, as smaller previous intervention studies, our results suggest that higher diet quality is related to lower liver fat, but larger trials with iso-caloric interventions are needed to corroborate these findings.- Published
- 2020
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9. Circulating 27-hydroxycholesterol and breast cancer tissue expression of CYP27A1, CYP7B1, LXR-β, and ERβ: results from the EPIC-Heidelberg cohort.
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Le Cornet C, Walter B, Sookthai D, Johnson TS, Kühn T, Herpel E, Kaaks R, and Fortner RT
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- Breast Neoplasms metabolism, Case-Control Studies, Cholestanetriol 26-Monooxygenase metabolism, Cytochrome P450 Family 7 metabolism, Estrogen Receptor beta metabolism, Female, Germany epidemiology, Humans, Liver X Receptors metabolism, Middle Aged, Molecular Typing methods, Neoplasm Grading, Nutrition Assessment, Prospective Studies, Risk Factors, Steroid Hydroxylases metabolism, Biomarkers, Tumor analysis, Biomarkers, Tumor metabolism, Breast Neoplasms diagnosis, Breast Neoplasms epidemiology, Hydroxycholesterols blood
- Abstract
Background: Experimental and epidemiological studies demonstrate a role for 27-hydroxycholesterol (27HC) in breast cancer development, though results are conflicting. Cholesterol 27-hydroxylase (CYP27A1) and oxysterol 7-alpha-hydroxylase (CYP7B1) regulate 27HC concentrations, while differential expression of the liver X receptor (LXR) and estrogen receptor beta (ERβ) may impact the association between 27HC and breast cancer risk., Methods: We evaluated correlates of tumor tissue expression of CYP27A1, CYP7B1, LXR-β, and ERβ and the association between circulating prediagnostic 27HC concentrations and breast cancer risk by marker expression in a nested case-control study within the European Prospective Investigation into Cancer and Nutrition (EPIC)-Heidelberg cohort including 287 breast cancer cases with tumor tissue available. Tumor protein expression was evaluated using immunohistochemistry, and serum 27HC concentrations quantified using liquid chromatography-mass spectrometry. Conditional logistic regression models were used to estimate odds ratios (ORs) and 95% confidence intervals (CIs)., Results: A higher proportion of CYP7B1-positive cases were progesterone receptor (PR)-positive, relative to CYP7B1-negative cases, whereas a higher proportion of ERβ-positive cases were Bcl-2 low, relative to ERβ-negative cases. No differences in tumor tissue marker positivity were observed by reproductive and lifestyle factors. We observed limited evidence of heterogeneity in associations between circulating 27HC and breast cancer risk by tumor tissue expression of CYP27A1, CYP7B1, LXR-β, and ERβ, with the exception of statistically significant heterogeneity by LXR-β status in the subgroup of women perimenopausal at blood collection (p = 0.02)., Conclusion: This exploratory study suggests limited associations between tumor marker status and epidemiologic or breast cancer characteristics. Furthermore, the association between circulating 27HC and breast cancer risk may not vary by tumor expression of CYP27A1, CYP7B1, LXR-β, or ERβ.
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- 2020
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10. Post-Mastectomy Radiotherapy After Neoadjuvant Chemotherapy in Breast Cancer: A Pooled Retrospective Analysis of Three Prospective Randomized Trials.
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Krug D, Lederer B, Seither F, Nekljudova V, Ataseven B, Blohmer JU, Costa SD, Denkert C, Ditsch N, Gerber B, Hanusch C, Heil J, Hilfrich J, Huober JB, Jackisch C, Kümmel S, Paepke S, Schem C, Schneeweiss A, Untch M, Debus J, von Minckwitz G, Kühn T, and Loibl S
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- Adult, Aged, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Breast Neoplasms pathology, Breast Neoplasms therapy, Carcinoma, Ductal, Breast pathology, Carcinoma, Ductal, Breast therapy, Carcinoma, Lobular pathology, Carcinoma, Lobular therapy, Combined Modality Therapy, Female, Follow-Up Studies, Germany epidemiology, Humans, Incidence, Middle Aged, Neoplasm Recurrence, Local epidemiology, Neoplasm Recurrence, Local pathology, Neoplasm Recurrence, Local therapy, Prognosis, Prospective Studies, Retrospective Studies, Survival Rate, Young Adult, Breast Neoplasms mortality, Carcinoma, Ductal, Breast mortality, Carcinoma, Lobular mortality, Mastectomy mortality, Neoadjuvant Therapy mortality, Neoplasm Recurrence, Local mortality, Radiotherapy mortality
- Abstract
Background: The impact of locoregional radiotherapy (RT) after neoadjuvant chemotherapy (NACT) and mastectomy in breast cancer patients is currently unclear. Several publications have suggested that patients with a favorable response to NACT might not benefit from RT after mastectomy., Methods: A retrospective analysis of three prospective randomized NACT trials was performed. Information on the use of RT was available for 817 breast cancer patients with non-inflammatory breast cancer who underwent mastectomy after NACT within the GeparTrio, GeparQuattro, and GeparQuinto-trials. RT was administered to 676 of these patients (82.7%)., Results: The 5-year cumulative incidence of locoregional recurrence (LRR) was 15.2% (95% confidence interval [CI] 9.0-22.8%) in patients treated without RT and 11.3% in patients treated with RT (95% CI 8.7-14.3%). In the multivariate analysis, RT was associated with a lower risk of LRR (hazard ratio 0.51, 95% CI 0.27-1.0; p = 0.05). This effect was shown especially in patients with cT3/4 tumors, as well as in patients who were cN+ before neoadjuvant therapy, including those who converted to ypN0 after neoadjuvant therapy. In the bivariate analysis, disease-free survival was significantly worse in patients who received RT, however this was not confirmed in the multivariate analysis., Conclusions: Our results suggest that RT reduces the LRR rates in breast cancer patients who receive a mastectomy after NACT without an improvement in DFS. Prospective randomized controlled trials such as the National Surgical Adjuvant Breast and Bowel Project B-51/RTOG 1304 trial will analyze whether RT has any benefit in patients who have a favorable response after NACT.
- Published
- 2019
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11. Comparison of metabolite networks from four German population-based studies.
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Iqbal K, Dietrich S, Wittenbecher C, Krumsiek J, Kühn T, Lacruz ME, Kluttig A, Prehn C, Adamski J, von Bergen M, Kaaks R, Schulze MB, Boeing H, and Floegel A
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- Aged, Correlation of Data, Cross-Sectional Studies, Female, Germany epidemiology, Humans, Male, Middle Aged, Normal Distribution, Nutrition Surveys statistics & numerical data, Aging metabolism, Cardiovascular Diseases epidemiology, Cardiovascular Diseases metabolism, Metabolic Networks and Pathways, Metabolome, Metabolomics methods, Metabolomics statistics & numerical data, Neoplasms epidemiology, Neoplasms metabolism
- Abstract
Background: Metabolite networks are suggested to reflect biological pathways in health and disease. However, it is unknown whether such metabolite networks are reproducible across different populations. Therefore, the current study aimed to investigate similarity of metabolite networks in four German population-based studies., Methods: One hundred serum metabolites were quantified in European Prospective Investigation into Cancer and Nutrition (EPIC)-Potsdam (n = 2458), EPIC-Heidelberg (n = 812), KORA (Cooperative Health Research in the Augsburg Region) (n = 3029) and CARLA (Cardiovascular Disease, Living and Ageing in Halle) (n = 1427) with targeted metabolomics. In a cross-sectional analysis, Gaussian graphical models were used to construct similar networks of 100 edges each, based on partial correlations of these metabolites. The four metabolite networks of the top 100 edges were compared based on (i) common features, i.e. number of common edges, Pearson correlation (r) and hamming distance (h); and (ii) meta-analysis of the four networks., Results: Among the four networks, 57 common edges and 66 common nodes (metabolites) were identified. Pairwise network comparisons showed moderate to high similarity (r = 63-0.96, h = 7-72), among the networks. Meta-analysis of the networks showed that, among the 100 edges and 89 nodes of the meta-analytic network, 57 edges and 66 metabolites were present in all the four networks, 58-76 edges and 75-89 nodes were present in at least three networks, and 63-84 edges and 76-87 edges were present in at least two networks. The meta-analytic network showed clear grouping of 10 sphingolipids, 8 lyso-phosphatidylcholines, 31 acyl-alkyl-phosphatidylcholines, 30 diacyl-phosphatidylcholines, 8 amino acids and 2 acylcarnitines., Conclusions: We found structural similarity in metabolite networks from four large studies. Using a meta-analytic network, as a new approach for combining metabolite data from different studies, closely related metabolites could be identified, for some of which the biological relationships in metabolic pathways have been previously described. They are candidates for further investigation to explore their potential role in biological processes.
- Published
- 2018
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12. Influence of side-effects on early therapy persistence with letrozole in post-menopausal patients with early breast cancer: Results of the prospective EvAluate-TM study.
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Nabieva N, Fehm T, Häberle L, de Waal J, Rezai M, Baier B, Baake G, Kolberg HC, Guggenberger M, Warm M, Harbeck N, Wuerstlein R, Deuker JU, Dall P, Richter B, Wachsmann G, Brucker C, Siebers JW, Popovic M, Kuhn T, Wolf C, Vollert HW, Breitbach GP, Janni W, Landthaler R, Kohls A, Rezek D, Noesselt T, Fischer G, Henschen S, Praetz T, Heyl V, Kühn T, Krauss T, Thomssen C, Hohn A, Tesch H, Mundhenke C, Hein A, Hack CC, Schmidt K, Belleville E, Brucker SY, Kümmel S, Beckmann MW, Wallwiener D, Hadji P, and Fasching PA
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- Aged, Breast Neoplasms pathology, Female, Germany, Humans, Middle Aged, Prospective Studies, Risk Factors, Time Factors, Treatment Outcome, Antineoplastic Agents adverse effects, Aromatase Inhibitors adverse effects, Breast Neoplasms drug therapy, Letrozole adverse effects, Medication Adherence, Postmenopause
- Abstract
Background: Endocrine treatment (ET) with an aromatase inhibitor (AI) is the treatment of choice in post-menopausal patients with hormone receptor-positive early breast cancer (EBC). However, adverse events (AEs) often lead to treatment discontinuation. This analysis aimed to identify side-effects that lead to patients failing to persist with letrozole treatment., Patients and Methods: Post-menopausal hormone receptor-positive EBC patients starting ET with letrozole were enroled in EvAluate-TM, a non-interventional study. Information regarding treatment compliance and persistence was gathered in months 6 and 12. Persistence was defined as the time from 30 d after the start to the end of treatment. The influence on persistence of musculoskeletal syndrome, menopausal disorder, sleep disorder and other AEs within the first 30 d was analysed using Cox regression analyses., Results: Among 3887 patients analysed, the persistence rate after 12 months was >85%. In all, 568 patients (14.6%) discontinued the treatment, 358 of whom (63.0%) did so only because of side-effects. The main AEs influencing persistence were musculoskeletal symptoms (hazard ratio [HR] 2.55; 95% confidence interval [CI], 1.90-3.42), sleep disorders (HR 1.95; 95% CI, 1.41-2.70) and other AEs (HR 2.03; 95% CI, 1.51-2.73). Menopausal disorder was not associated with non-persistence (HR 1.17; 95% CI, 0.74-1.84)., Conclusions: These results suggest that side-effects of AIs such as musculoskeletal syndrome and sleep disorder lead to ET discontinuation within the first treatment year in significant numbers of EBC patients. Compliance programmes adapted for subgroups that are at risk for early non-persistence might help to ensure the recommended therapy duration., Clinical Trials Number: CFEM345DDE19., (Copyright © 2018 Elsevier Ltd. All rights reserved.)
- Published
- 2018
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13. Obesity as risk factor for subtypes of breast cancer: results from a prospective cohort study.
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Nattenmüller CJ, Kriegsmann M, Sookthai D, Fortner RT, Steffen A, Walter B, Johnson T, Kneisel J, Katzke V, Bergmann M, Sinn HP, Schirmacher P, Herpel E, Boeing H, Kaaks R, and Kühn T
- Subjects
- Adult, Age Factors, Body Mass Index, Breast pathology, Breast Neoplasms drug therapy, Breast Neoplasms pathology, Female, Germany epidemiology, Humans, Incidence, Middle Aged, Premenopause, Prospective Studies, Risk Factors, Biomarkers, Tumor metabolism, Breast Neoplasms epidemiology, Estrogen Replacement Therapy, Obesity epidemiology
- Abstract
Background: Earlier epidemiological studies indicate that associations between obesity and breast cancer risk may not only depend on menopausal status and use of exogenous hormones, but might also differ by tumor subtype. Here, we evaluated whether obesity is differentially associated with the risk of breast tumor subtypes, as defined by 6 immunohistochemical markers (ER, PR, HER2, Ki67, Bcl-2 and p53, separately and combined), in the prospective EPIC-Germany Study (n = 27,012)., Methods: Formalin-fixed and paraffin-embedded (FFPE) tumor tissues of 657 incident breast cancer cases were used for histopathological analyses. Associations between BMI and breast cancer risk across subtypes were evaluated by multivariable Cox regression models stratified by menopausal status and hormone therapy (HT) use., Results: Among postmenopausal non-users of HT, higher BMI was significantly associated with an increased risk of less aggressive, i.e. ER+, PR+, HER2-, Ki67
low , Bcl-2+ and p53- tumors (HR per 5 kg/m2 : 1.44 [1.10, 1.90], p = 0.009), but not with risk of more aggressive tumor subtypes. Among postmenopausal users of HT, BMI was significantly inversely associated with less aggressive tumors (HR per 5 kg/m2 : 0.68 [0.50, 0.94], p = 0.018). Finally, among pre- and perimenopausal women, Cox regression models did not reveal significant linear associations between BMI and risk of any tumor subtype, although analyses by BMI tertiles showed a significantly lower risk of less aggressive tumors for women in the highest tertile (HR: 0.55 [0.33, 0.93])., Conclusion: Overall, our results suggest that obesity is related to risk of breast tumors with lower aggressiveness, a finding that requires replication in larger-scale analyses of pooled prospective data.- Published
- 2018
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14. Serum metabolites and risk of myocardial infarction and ischemic stroke: a targeted metabolomic approach in two German prospective cohorts.
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Floegel A, Kühn T, Sookthai D, Johnson T, Prehn C, Rolle-Kampczyk U, Otto W, Weikert C, Illig T, von Bergen M, Adamski J, Boeing H, Kaaks R, and Pischon T
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- Aged, Amino Acids blood, Brain Ischemia blood, Brain Ischemia epidemiology, Carnitine analogs & derivatives, Carnitine blood, Female, Germany epidemiology, Humans, Incidence, Male, Middle Aged, Myocardial Infarction blood, Myocardial Infarction epidemiology, Phosphatidylcholines blood, Prospective Studies, Risk Factors, Stroke etiology, Triglycerides blood, Biomarkers blood, Metabolomics methods, Serum metabolism
- Abstract
Metabolomic approaches in prospective cohorts may offer a unique snapshot into early metabolic perturbations that are associated with a higher risk of cardiovascular diseases (CVD) in healthy people. We investigated the association of 105 serum metabolites, including acylcarnitines, amino acids, phospholipids and hexose, with risk of myocardial infarction (MI) and ischemic stroke in the European Prospective Investigation into Cancer and Nutrition (EPIC)-Potsdam (27,548 adults) and Heidelberg (25,540 adults) cohorts. Using case-cohort designs, we measured metabolites among individuals who were free of CVD and diabetes at blood draw but developed MI (n = 204 and n = 228) or stroke (n = 147 and n = 121) during follow-up (mean, 7.8 and 7.3 years) and among randomly drawn subcohorts (n = 2214 and n = 770). We used Cox regression analysis and combined results using meta-analysis. Independent of classical CVD risk factors, ten metabolites were associated with risk of MI in both cohorts, including sphingomyelins, diacyl-phosphatidylcholines and acyl-alkyl-phosphatidylcholines with pooled relative risks in the range of 1.21-1.40 per one standard deviation increase in metabolite concentrations. The metabolites showed positive correlations with total- and LDL-cholesterol (r ranged from 0.13 to 0.57). When additionally adjusting for total-, LDL- and HDL-cholesterol, triglycerides and C-reactive protein, acyl-alkyl-phosphatidylcholine C36:3 and diacyl-phosphatidylcholines C38:3 and C40:4 remained associated with risk of MI. When added to classical CVD risk models these metabolites further improved CVD prediction (c-statistics increased from 0.8365 to 0.8384 in EPIC-Potsdam and from 0.8344 to 0.8378 in EPIC-Heidelberg). None of the metabolites was consistently associated with stroke risk. Alterations in sphingomyelin and phosphatidylcholine metabolism, and particularly metabolites of the arachidonic acid pathway are independently associated with risk of MI in healthy adults.
- Published
- 2018
- Full Text
- View/download PDF
15. Weight cycling and the risk of type 2 diabetes in the EPIC-Germany cohort.
- Author
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Neamat-Allah J, Barrdahl M, Hüsing A, Katzke VA, Bachlechner U, Steffen A, Kaaks R, Schulze MB, Boeing H, and Kühn T
- Subjects
- Adult, Aged, Body Mass Index, Cohort Studies, Educational Status, Female, Germany epidemiology, Humans, Incidence, Male, Middle Aged, Principal Component Analysis, Prospective Studies, Risk Assessment, Smoking epidemiology, Weight Gain, Weight Loss, Body Weight, Diabetes Mellitus, Type 2 epidemiology
- Abstract
Aims/hypothesis: Studies on weight cycling and the risk of type 2 diabetes have revealed inconsistent results, possibly due to differences in the definition of weight fluctuations. Here, we investigated whether weight cycling during adulthood is related to diabetes risk in a large cohort study, using a complementary approach to define patterns of weight development., Methods: Weight cycling, weight loss and weight gain were defined (1) a priori, using distinct categories, and (2) by functional principal component analysis (FPCA) to capture weight patterns in greater detail. Associations of weight cycling, weight loss and weight gain with the risk of type 2 diabetes were evaluated by Cox regression models., Results: A priori defined weight cycling was associated with increased diabetes risk, compared with stable weight (HR 1.36 [95% CI 1.09, 1.68]). No significant association between FPCA-derived weight cycling and risk of diabetes was observed after adjustment for concurrent weight patterns (HR 1.19 [95% CI 0.89, 1.60]). Subgroup analyses showed that FPCA-derived weight cycling during net weight gain was associated with a higher risk of diabetes (HR 1.68 [95% CI 1.14, 2.48]). A priori defined weight gain (HR 2.08 [95% CI 1.60, 2.70]) was more clearly related to the risk of diabetes than FPCA-derived weight gain (HR 1.20 [95% CI 0.95, 1.51]), while no significant associations were observed for weight loss., Conclusions/interpretation: Overall, weight cycling may not be an independent risk factor for type 2 diabetes when accounting for concurrent patterns of weight development. However, weight cycling may pose a stronger risk of diabetes than non-cycling during net weight gain.
- Published
- 2015
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16. Potential Predictors of Plasma Fibroblast Growth Factor 23 Concentrations: Cross-Sectional Analysis in the EPIC-Germany Study.
- Author
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di Giuseppe R, Kühn T, Hirche F, Buijsse B, Dierkes J, Fritsche A, Kaaks R, Boeing H, Stangl GI, and Weikert C
- Subjects
- Adult, Aged, C-Reactive Protein analysis, Calcium, Dietary analysis, Cardiovascular Diseases diagnosis, Creatinine blood, Cross-Sectional Studies, Female, Fibroblast Growth Factor-23, Germany, Humans, Iron, Dietary analysis, Linear Models, Male, Middle Aged, Multivariate Analysis, Parathyroid Hormone blood, Phosphorus blood, Predictive Value of Tests, Prognosis, Prospective Studies, Renal Insufficiency, Chronic diagnosis, Risk Factors, Sex Factors, Smoking, Cardiovascular Diseases blood, Fibroblast Growth Factors blood, Renal Insufficiency, Chronic blood
- Abstract
Background: Increased fibroblast growth factor 23 (FGF23), a bone-derived hormone involved in the regulation of phosphate and vitamin D metabolism, has been related to the development of cardiovascular disease (CVD) in chronic kidney disease patients and in the general population. However, what determines higher FGF23 levels is still unclear. Also, little is known about the influence of diet on FGF23. The aim of this study was therefore to identify demographic, clinical and dietary correlates of high FGF23 concentrations in the general population., Methods: We performed a cross-sectional analysis within a randomly selected subcohort of the European Prospective Investigation into Cancer and Nutrition (EPIC)-Germany comprising 2134 middle-aged men and women. The Human FGF23 (C-Terminal) ELISA kit was used to measure FGF23 in citrate plasma. Dietary data were obtained at baseline via validated food frequency questionnaires including up to 148 food items., Results: Multivariable adjusted logistic regression showed that men had a 66% lower and smokers a 64% higher probability of having higher FGF23 (≥ 90 RU/mL) levels compared, respectively, with women and nonsmokers. Each doubling in parathyroid hormone, creatinine, and C-reactive protein was related to higher FGF23. Among the dietary factors, each doubling in calcium and total energy intake was related, respectively, to a 1.75 and to a 4.41 fold increased probability of having higher FGF23. Finally, each doubling in the intake of iron was related to an 82% lower probability of having higher FGF23 levels. Results did not substantially change after exclusion of participants with lower kidney function., Conclusions: In middle-aged men and women traditional and non-traditional CVD risk factors were related to higher FGF23 concentrations. These findings may contribute to the understanding of the potential mechanisms linking increased FGF23 to increased CVD risk.
- Published
- 2015
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17. Preterm prelabor rupture of membranes and outcome of very-low-birth-weight infants in the German Neonatal Network.
- Author
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Hanke K, Hartz A, Manz M, Bendiks M, Heitmann F, Orlikowsky T, Müller A, Olbertz D, Kühn T, Siegel J, von der Wense A, Wieg C, Kribs A, Stein A, Pagel J, Herting E, Göpel W, and Härtel C
- Subjects
- Cohort Studies, Female, Germany epidemiology, Humans, Infant, Newborn, Logistic Models, Mortality, Pregnancy, Fetal Membranes, Premature Rupture epidemiology, Fetal Membranes, Premature Rupture physiopathology, Infant, Very Low Birth Weight physiology, Premature Birth epidemiology, Premature Birth etiology
- Abstract
Objective: It was the aim of our study to evaluate the independent effect of preterm prelabor rupture of membranes (PPROM) as a cause of preterm delivery on mortality during primary hospital stay and significant morbidities in very-low-birth-weight (VLBW) infants < 32 weeks of gestation., Design: Observational, epidemiological study design., Setting: Population-based cohort, German Neonatal Network (GNN)., Population: 6102 VLBW infants were enrolled in GNN from 2009-2012, n=4120 fulfilled criteria for primary analysis (< 32 gestational weeks, no pre-eclampsia, HELLP (highly elevated liver enzymes and low platelets syndrome) or placental abruption as cause of preterm birth)., Methods: Multivariable logistic regression analyses included PPROM as potential risk factors for adverse outcomes and well established items such as gestational age in weeks, birth weight, antenatal steroids, center, inborn delivery, multiple birth, gender and being small-for-gestational-age., Results: PPROM as cause of preterm delivery had no independent effect on the risk of early-onset sepsis, clinical sepsis and blood-culture proven sepsis, while gestational age proved to be the most important contributor to sepsis risk. The diagnosis of PPROM was associated with an increased risk for bronchopulmonary dysplasia (BPD; OR: 1.25, 95% CI: 1.02-1.55, p=0.03) but not with other major outcomes., Conclusions: The diagnosis of PPROM per se is not associated with adverse outcome in VLBW infants < 32 weeks apart from a moderately increased risk for BPD. Randomized controlled trials with primary neonatal outcomes are needed to determine which subgroup of VLBW infants benefit from expectant or intentional management of PPROM.
- Published
- 2015
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18. Plasma fibroblast growth factor 23 and risk of cardiovascular disease: results from the EPIC-Germany case-cohort study.
- Author
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di Giuseppe R, Kühn T, Hirche F, Buijsse B, Dierkes J, Fritsche A, Kaaks R, Boeing H, Stangl GI, and Weikert C
- Subjects
- Adult, Age Distribution, Aged, Aged, 80 and over, Biomarkers blood, Cardiovascular Diseases blood, Female, Fibroblast Growth Factor-23, Germany epidemiology, Humans, Incidence, Male, Middle Aged, Myocardial Infarction epidemiology, Prospective Studies, Risk Factors, Sex Distribution, Stroke epidemiology, Cardiovascular Diseases epidemiology, Fibroblast Growth Factors blood, Myocardial Infarction blood, Population Surveillance, Stroke blood
- Abstract
Increased fibroblast growth factor 23 (FGF23) concentrations have emerged as a novel risk factor for heart failure and stroke but not for myocardial infarction (MI). Yet, most studies on MI were conducted in coronary artery disease (CAD) patients and the elderly. Evidence is unclear in subjects without CAD and for stroke subtypes. We investigated the relationships between FGF23 and overall major cardiovascular endpoints, incident MI, ischemic (IS) and haemorrhagic stroke (HS) in middle-aged adults without pre-existing cardiovascular disease. We used a case-cohort study nested within the European Prospective Investigation into Cancer and Nutrition-Germany, including a randomly drawn subcohort (n = 1,978), incident MI (n = 463) and stroke cases (n = 359 IS; n = 88 HS) identified during a mean follow-up of 8.2 years. Compared with participants with FGF23 levels in the lowest quartile, those in the highest quartile had a 36% increased risk for cardiovascular events [hazard ratio: 1.36, 95% confidence interval (CI): 1.02-1.82] after adjustment for established cardiovascular risk factors, patahyroid hormone and 25-hydroxyvitamin D3 levels, dietary calcium and phosphorus intake, and kidney function. However, sub-analyses revealed significant relationships with risk of MI and HS, but not IS. Compared with the lowest quartile, individuals in the top two FGF23 quartiles had a 1.62 (95% CI 1.07-2.45) fold increased risk for MI and a 2.61 (95% CI 1.23-5.52) fold increase for HS. Increased FGF23 emerged as a risk factor for both MI and HS. Further studies are warranted to confirm these results and to identify underlying mechanisms.
- Published
- 2015
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- View/download PDF
19. Dietary, lifestyle, and genetic determinants of vitamin D status: a cross-sectional analysis from the European Prospective Investigation into Cancer and Nutrition (EPIC)-Germany study.
- Author
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Kühn T, Kaaks R, Teucher B, Hirche F, Dierkes J, Weikert C, Katzke V, Boeing H, Stangl GI, and Buijsse B
- Subjects
- 25-Hydroxyvitamin D 2 blood, Adult, Aged, Calcifediol blood, Cohort Studies, Cross-Sectional Studies, Diet ethnology, Female, Germany epidemiology, Humans, Male, Middle Aged, Nutrition Surveys, Prevalence, Prospective Studies, Seasons, Vitamin D Deficiency ethnology, Vitamin D Deficiency etiology, Vitamin D Deficiency genetics, Diet adverse effects, Life Style ethnology, Models, Biological, Nutritional Status ethnology, Vitamin D Deficiency epidemiology
- Abstract
Purpose: Considerable variation in 25-hydroxyvitamin D (25(OH)D) in populations worldwide that seems to be independent of latitude has been reported. Therefore, we aimed to assess vitamin D status of a mid-aged German general population and to identify its dietary, lifestyle, anthropometric, and genetic determinants., Methods: 25(OH)D concentrations were measured by LC-MS/MS in plasma samples of a random subcohort of the German arm of the European Prospective Investigation into Cancer and Nutrition (EPIC) comprising 2,100 subjects aged 35-65 years. Associations between potential predictors and 25(OH)D were assessed by linear regression models., Results: 32.8% of the variance in 25(OH)D was explained by a multivariable regression model, with season being the by far strongest predictor (semi-partial R²: 14.6%). Sex, waist circumference, leisure time physical activity, smoking, polymorphisms in the GC, CYP2R1, and DHCR7 genes, supplement use, exogenous hormone use, alcohol consumption, egg consumption, and fish consumption were significantly associated with 25(OH)D concentrations as well. However, none of these factors explained >2.3% of the variance in 25(OH)D., Conclusion: Even with a comprehensive set of genetic, anthropometric, dietary, and lifestyle correlates, not more than 32.8% of the variation in 25(OH)D could be explained in the EPIC-Germany study, implying that vitamin D prediction scores may not provide an appropriate proxy for measured 25(OH)D. Food intake was only a weak predictor of 25(OH)D concentrations, while a strong seasonal fluctuation in 25(OH)D was shown.
- Published
- 2014
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20. Influence of smoking and alcohol during pregnancy on outcome of VLBW infants.
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Spiegler J, Jensen R, Segerer H, Ehlers S, Kühn T, Jenke A, Gebauer C, Möller J, Orlikowsky T, Heitmann F, Boeckenholt K, Herting E, and Göpel W
- Subjects
- Causality, Child, Preschool, Female, Germany epidemiology, Humans, Infant, Infant, Newborn, Pregnancy, Prevalence, Retinopathy of Prematurity epidemiology, Risk Factors, Alcohol Drinking epidemiology, Bronchitis epidemiology, Bronchopulmonary Dysplasia epidemiology, Fetal Growth Retardation epidemiology, Infant, Very Low Birth Weight, Prenatal Exposure Delayed Effects epidemiology, Smoking epidemiology
- Abstract
Background: Nicotine and alcohol consumption have been associated with premature delivery and adverse neonatal outcome. We wanted to analyze the influence of self-reported nicotine and alcohol consumption on outcome of VLBW infants., Material and Methods: In an ongoing multicenter study 2475 parents of former very low birth weight (VLBW) infants born between January 2009 and December 2011 answered questionnaires about maternal smoking habits and alcohol consumption during pregnancy. 2463 (99.5%) completed questions on alcohol consumption and 2462 (99.5%) on smoking habits. These infants were stratified to reported maternal smoking and alcohol consumption during pregnancy. We compared the reasons for premature delivery, neonatal outcome and parental reports on bronchitis during the first year of life, as well as growth and development at age 2 years to pregnancy exposure., Results: In nicotine exposed infants intrauterine growth restriction (31 vs. 21%, p<0.01), a birth weight below the 10th percentile (26 vs. 17%, p<0.01) and placenta abruption (9.2 vs. 5.8%, p<0.05) was seen more often. Premature rupture of membranes (24 vs. 30%, p<0.05) or HELLP syndrome (6 vs. 11%, p<0.01) was less frequent. A birth weight below the 3rd percentile was seen more frequently in mothers with reported alcohol consumption (13 vs. 6%, p<0.05). We noted an increased rate of BPD and ROP if mothers reported smoking during pregnancy (p<0.05). Growth parameters and scores on Bayley Sscales of infant development at age 2 years did not differ., Conclusion: Smoking during pregnancy results in a high rate of growth restricted VLBW infants. Prenatal exposition to nicotine seems to increase postnatal complications such as BPD und ROP., (© Georg Thieme Verlag KG Stuttgart · New York.)
- Published
- 2013
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21. Plasma 25-hydroxyvitamin D and its genetic determinants in relation to incident type 2 diabetes: a prospective case-cohort study.
- Author
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Buijsse B, Boeing H, Hirche F, Weikert C, Schulze MB, Gottschald M, Kühn T, Katzke VA, Teucher B, Dierkes J, Stangl GI, and Kaaks R
- Subjects
- Adult, Aged, Case-Control Studies, Diabetes Mellitus, Type 2 genetics, Female, Genotype, Germany epidemiology, Humans, Incidence, Middle Aged, Polymorphism, Single Nucleotide, Prospective Studies, Risk Factors, Surveys and Questionnaires, Vitamin D blood, Vitamin D genetics, White People genetics, White People statistics & numerical data, Diabetes Mellitus, Type 2 blood, Diabetes Mellitus, Type 2 epidemiology, Vitamin D analogs & derivatives
- Abstract
It is unclear whether vitamin D lowers risk of type 2 diabetes (T2D). In an observational study, we assessed the prospective association between plasma 25-hydroxyvitamin D (25(OH)D) and incident T2D, and evaluated whether it holds up for genetically determined elevated 25(OH)D. We used a case-cohort study nested within the German arm of the European Prospective Investigation into Cancer. From a total cohort of 53,088 participants with a mean follow-up of 6.6 years, we identified a random subcohort of 2,121 participants (57% women) and 1,572 incident cases of T2D. 25(OH)D was measured in baseline plasma samples retrieved from frozen storage. Mean plasma 25(OH)D in the subcohort was 47.1 (5th-95th percentile 19.6-80.7) nmol/L. After controlling for age, sex, center, season of blood draw, education, and lifestyle, the hazard of T2D decreased across increasing plasma concentrations of 25(OH)D (P linear trend<0.0001). The association became non-linear after adjustment for BMI and waist circumference (P non-linearity<0.0001), with the inverse association being restricted to participants with 25(OH)D concentrations below ~45 nmol/L (hazard ratio per 5 nmol/L higher 25(OH)D 0.91, 95% CI 0.84-0.98). A score predicting genetically determined plasma 25(OH)D by weighting four independent single-nucleotide polymorphisms by their effect on 25(OH)D, explained 3.7% of the variance in 25(OH)D. The hazard ratio (95% CI) per 5 nmol/L higher genetically predicted 25(OH)D was 0.98 (0.89-1.08) in the entire study sample and 1.06 (0.93-1.21) in the sub-sample with 25(OH)D<45 nmol/L. This latter finding casts doubt on a strong causal association of 25(OH)D with T2D, but further research in large-scale consortia is needed.
- Published
- 2013
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22. Plasma 25-hydroxyvitamin D and its genetic determinants in relation to incident myocardial infarction and stroke in the European prospective investigation into cancer and nutrition (EPIC)-Germany study.
- Author
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Kühn T, Kaaks R, Teucher B, Hirche F, Dierkes J, Weikert C, Katzke V, Boeing H, Stangl GI, and Buijsse B
- Subjects
- Adult, Aged, Female, Genome-Wide Association Study, Germany epidemiology, Humans, Incidence, Male, Middle Aged, Myocardial Infarction blood, Myocardial Infarction epidemiology, Myocardial Infarction ethnology, Prospective Studies, Risk Factors, Stroke blood, Stroke epidemiology, Stroke ethnology, Tandem Mass Spectrometry, Vitamin D blood, White People, Myocardial Infarction genetics, Oxidoreductases genetics, Polymorphism, Single Nucleotide, Steroid Hydroxylases genetics, Stroke genetics, Vitamin D analogs & derivatives
- Abstract
Circulating 25-hydroxyvitamin D (25(OH)D) has been associated with cardiovascular disease (CVD) risk in observational studies. Also, SNPs to explain variation in 25(OH)D have been identified by genome-wide association studies. Detection of direct associations between SNPs that significantly affect 25(OH)D and CVD risk would indicate a causal role of vitamin D, as reverse causation could be excluded and confounding could be better controlled. Thus, a combined analysis of candidate SNPs in relation to circulating 25(OH)D and CVD risk was carried out. A case-cohort study within the EPIC-Germany study was conducted comprising a randomly drawn subcohort of 2,132 subjects (57.9% women, mean age: 50.6 years) and incident cases of myocardial infarction (n=559) and stroke (n=471) that occurred during a mean follow-up duration of 7.6 years. 25(OH)D concentrations were measured by LC-MS/MS in baseline plasma samples. Additionally, eight candidate SNPs were assayed. Associations between 25(OH)D, SNPs and the risks of myocardial infarction and stroke were assessed by multivariable regression analyses. Mean 25(OH)D level was 47.2 nmol/L in the subcohort. Four SNPs were associated with 25(OH)D (p<0.05). In subjects with 25(OH)D levels <25 nmol/L, the risks of CVD as composite endpoint (Hazard Ratio: 1.53, 95% confidence interval: 1.12-2.09), myocardial infarction, and stroke were significantly increased compared to subjects with levels ≥ 50 nmol/L, while no significant linear associations were observed. A SNP score was not related to the risks of total CVD (Hazard Ratio: 1.0, 95% confidence interval: 0.71-1.42), myocardial infarction, or stroke. The same was true concerning single SNPs. Given the lack of association between SNPs and the risks of stroke and myocardial infarction, the present findings do not point to a major causal role of vitamin D in the development of these diseases. However, a detection of modest associations between genetic markers and CVD risk in larger consortia cannot be ruled out.
- Published
- 2013
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23. Using the 21-gene assay to guide adjuvant chemotherapy decision-making in early-stage breast cancer: a cost-effectiveness evaluation in the German setting.
- Author
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Blohmer JU, Rezai M, Kümmel S, Kühn T, Warm M, Friedrichs K, Benkow A, Valentine WJ, and Eiermann W
- Subjects
- Adult, Age Factors, Aged, Antineoplastic Combined Chemotherapy Protocols administration & dosage, Antineoplastic Combined Chemotherapy Protocols economics, Clinical Trials as Topic, Cost-Benefit Analysis, Decision Making, Female, Gene Expression Profiling, Germany, Health Expenditures statistics & numerical data, Humans, Life Expectancy, Markov Chains, Middle Aged, Models, Econometric, Multicenter Studies as Topic, Neoplasm Recurrence, Local economics, Neoplasm Recurrence, Local epidemiology, Quality-Adjusted Life Years, Receptor, ErbB-2 genetics, Reverse Transcriptase Polymerase Chain Reaction, Breast Neoplasms drug therapy, Breast Neoplasms genetics, Chemotherapy, Adjuvant economics
- Abstract
Objective: The 21-gene assay (Oncotype DX Breast Cancer Test (Genomic Health Inc., Redwood City, CA)) is a well validated test that predicts the likelihood of adjuvant chemotherapy benefit and the 10-year risk of distant recurrence in patients with ER+, HER2- early-stage breast cancer. The aim of this analysis was to evaluate the cost-effectiveness of using the assay to inform adjuvant chemotherapy decisions in Germany., Methods: A Markov model was developed to make long-term projections of distant recurrence, survival, quality-adjusted life expectancy, and direct costs for patients with ER+, HER2-, node-negative, or up to 3 node-positive early-stage breast cancer. Scenarios using conventional diagnostic procedures or the 21-gene assay to inform treatment recommendations for adjuvant chemotherapy were modeled based on a prospective, multi-center trial in 366 patients. Transition probabilities and risk adjustment were based on published landmark trials. Costs (2011 Euros (€)) were estimated from a sick fund perspective based on resource use in patients receiving chemotherapy. Future costs and clinical benefits were discounted at 3% annually., Results: The 21-gene assay was projected to increase mean life expectancy by 0.06 years and quality-adjusted life expectancy by 0.06 quality-adjusted life years (QALYs) compared with current clinical practice over a 30-year time horizon. Clinical benefits were driven by optimized allocation of adjuvant chemotherapy. Costs from a healthcare payer perspective were lower with the 21-gene assay by ∼€561 vs standard of care. Probabilistic sensitivity analysis indicated that there was an 87% probability that the 21-gene assay would be dominant (cost and life saving) to standard of care., Limitations: Country-specific data on the risk of distant recurrence and quality-of-life were not available., Conclusions: Guiding decision-making on adjuvant chemotherapy using the 21-gene assay was projected to improve survival, quality-adjusted life expectancy, and be cost saving vs the current standard of care women with ER+, HER2- early-stage breast cancer.
- Published
- 2013
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24. [Medical risk assessment in personal life insurance, disability insurance and accident insurance].
- Author
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Kühn T
- Subjects
- Actuarial Analysis, Germany, Humans, Health Status Indicators, Insurance, Accident statistics & numerical data, Insurance, Disability statistics & numerical data, Insurance, Life statistics & numerical data
- Published
- 2010
25. 2008 update of the guideline: early detection of breast cancer in Germany.
- Author
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Albert US, Altland H, Duda V, Engel J, Geraedts M, Heywang-Köbrunner S, Hölzel D, Kalbheim E, Koller M, König K, Kreienberg R, Kühn T, Lebeau A, Nass-Griegoleit I, Schlake W, Schmutzler R, Schreer I, Schulte H, Schulz-Wendtland R, Wagner U, and Kopp I
- Subjects
- Breast Neoplasms prevention & control, Breast Self-Examination methods, Evidence-Based Medicine, Female, Germany, Health Behavior, Health Promotion, Humans, Medical History Taking, Treatment Outcome, Breast Neoplasms diagnosis, Early Detection of Cancer
- Abstract
Introduction: The goal of the 2008 updated guideline: early detection of breast cancer in Germany is to support physicians as well as healthy and affected women in the decision-making process involved in the diagnostic chain for the early detection of breast cancer by providing them with evidence- and consensus-based recommendations. The updated guideline replaces the guideline issued in 2003., Materials and Methods: The guideline forms the basis for developing an effective and efficient national early breast cancer detection program that meets the standards set by the Council of Europe and WHO for cancer control programs. The guideline presents the current, evidence- and consensus-based state of scientific knowledge in a multidisciplinary approach for the entire diagnostic chain, consisting of history taking and risk consultation, information on health behavior, clinical breast examination, diagnostic imaging, image-guided percutaneous tissue-acquisition techniques, open surgical excisional biopsy and pathomorphological tissue evaluation. The guideline recommends a set of quality indicators to assure resource availability, performance quality and outcomes enhancing total quality management for early breast cancer diagnosis., Conclusion: Currently, early detection of breast cancer offers the most promising possibility to optimize the diagnosis and treatment of breast cancer and, as a result, reduce breast cancer mortality and improve health related quality of life in women.
- Published
- 2009
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26. [Guideline for the Early Detection of Breast Cancer in Germany 2008. Recommendations from the short version].
- Author
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Albert US, Altland H, Duda V, Engel J, Geraedts M, Heywang-Köbrunner S, Hölzel D, Kalbheim E, Koller M, König K, Kreienberg R, Kühn T, Lebeau A, Nass-Griegoleit I, Schlake W, Schmutzler R, Schreer I, Schulte H, Schulz-Wendtland R, Wagner U, and Kopp I
- Subjects
- Biopsy, Breast Neoplasms pathology, Breast Neoplasms surgery, Early Diagnosis, Female, Germany, Humans, Magnetic Resonance Imaging, Mammography, Mass Screening, Mastectomy, Segmental, Patient Care Team, Patient Education as Topic, Quality Assurance, Health Care, Quality Indicators, Health Care, Risk Factors, Ultrasonography, Mammary, Breast Neoplasms diagnosis
- Abstract
The updated 2008 German Guideline for Early Detection of Breast Cancer provides evidence-based and consensus-based recommendations of the knowledge gained by the German Society for Surgery and the German Society of Plastic, Aesthetic, and Reconstructive Surgeons together with 29 professional societies, associations, and nonmedical organizations. The guideline is meant to assist physicians, healthy women, and patients in medical decisions with recommendations regarding the diagnostic chain in early detection of breast cancer. In addition to these recommendations, the guideline also includes descriptions of quality assurance for resources, procedures, outcomes, and evaluation using a set of quality indicators. It updates the previous version from 2003. The guideline's recommendations are presented. They are described in detail in the full publication (in German) Geburtsh Frauenh 2008; 68:251-261. The long version of the Guideline, methods report, and evidence report are available on the internet at www.awmf-leitlinien.de (reg. no. 077/001) with free access.
- Published
- 2008
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- View/download PDF
27. [Insurance medicine risk assessment--also required in the future].
- Author
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Kühn T
- Subjects
- Forecasting, Germany, Humans, Actuarial Analysis trends, Insurance, Health statistics & numerical data
- Published
- 2008
28. [Cost-utility analysis of ranibizumab (Lucentis) in neovascular macular degeneration].
- Author
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Neubauer AS, Holz FG, Schrader W, Back EI, Kühn T, Hirneiss C, and Kampik A
- Subjects
- Aged, Aged, 80 and over, Antibodies, Monoclonal adverse effects, Antibodies, Monoclonal therapeutic use, Antibodies, Monoclonal, Humanized, Cost-Benefit Analysis, Dose-Response Relationship, Drug, Drug Administration Schedule, Female, Germany, Humans, Injections, Macular Degeneration drug therapy, Male, Middle Aged, National Health Programs economics, Randomized Controlled Trials as Topic, Ranibizumab, Retinal Neovascularization drug therapy, Visual Acuity drug effects, Vitreous Body, Antibodies, Monoclonal economics, Drug Costs statistics & numerical data, Macular Degeneration economics, Quality-Adjusted Life Years, Retinal Neovascularization economics
- Abstract
Purpose: Ranibizumab (Lucentis) stabilizes or improves visual acuity in a high percentage of patients with age-related macular degeneration (AMD). As this therapy is associated with significant costs, the aim of this study was to provide a cost-utility analysis, which considers both costs and utility of a therapy with ranibizumab in an economic model., Methods: The incremental utility for the patient was modelled based on visual acuity data of the MARINA and ANCHOR study. The utility data used assume that the better seeing eye is affected. The study groups used for comparison consisted of patients who only received best supportive care, e. g., low-vision aids. The baseline scenario of the model assumes 6 treatments per year over a 2 year time period - based on the assessment of an expert panel. Treatment costs were based on German pharmacy prices and recommendations for reimbursement of the intravitreal injections. In a univariate sensitivity analysis all important parameters were varied to assess the stability of the results., Results: The baseline scenario yields for predominantly classic lesions 16,882 euro/QALY (quality adjusted life year), for minimally classic CNV 24,766 euro/QALY and for occult CNV 26,170 euro/QALY. If a distribution of the CNV types with 18 - 25 - 57 % is assumed, the mean cost of therapy with ranibizumab amounts to 24,147 euro/QALY. Sensitivity analysis showed that all reasonable variations yielded results which are considered cost-effective (
0.4) visual acuity, for a variation of costs per treatment of +/- 20 %, and a prolonged treatment duration of 3 years., Conclusions: In the investigated szenario a therapy of neovascular AMD with ranibizumab is cost-effective for all angiographic subtypes as well as in the sensitivity analysis. - Published
- 2007
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29. [Results from a German interlaboratory test to establish the broth microdilution method for the determination of the minimum inhibitory concentration of bacteria from animals].
- Author
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Wallmann J, Böttner A, Hafez HM, Kehrenberg C, Kietzmann M, Klarmann D, Klein G, Krabisch P, Kühn T, Luhofer G, Richter A, Schwarz S, Sigge C, Traeder W, Waldmann KH, Werckenthin C, and Zschiesche E
- Subjects
- Animals, Anti-Bacterial Agents therapeutic use, Bacteria growth & development, Bacterial Infections drug therapy, Bacterial Infections microbiology, Drug Resistance, Bacterial, Germany, Microbial Sensitivity Tests standards, Reproducibility of Results, Sensitivity and Specificity, Anti-Bacterial Agents pharmacology, Bacteria drug effects, Bacterial Infections veterinary, Clinical Laboratory Techniques standards, Microbial Sensitivity Tests veterinary
- Abstract
In accordance with NCCLS guideline M31-A2, the DVG working group "antimicrobial resistance" developed a standard operating procedure (SOP) for the determination of the minimal inhibitory concentration (MIC) of antimicrobial agents by broth microdilution. This SOP was evaluated for its fitness for use in a national interlaboratory test. A total of 32 participating laboratories tested five strains (including two internationally accepted reference strains and three field strains representing in total three different bacterial species) three times at a one week interval each, using uniform microtitre plates. In 31 of the 32 laboratories more than 80% of MIC determinations performed yielded values in the expected range. In total 94.0% of the results were reproducible, with a lesser deviation of 4.0% from the expected values for laboratories performing MIC determination as a matter of routine (46.9%), compared to 7.9% for laboratories without such routine (53.1%). Comparing the consistency of results on the basis of the tested strains, a higher reproducibility of the results was observed for reference strains (96.1%) than for field strains (92.6%). In particular results obtained for the Streptococcus uberis field strain were afflicted with a higher error ratio (98 deviations from the expected values). Among the tested antimicrobial agents, a higher variability of results was recorded only for gentamicin with 16.7% divergent MIC determinations (mean value 6.0%). The high reproducibility of the results confirmed by this interlaboratory study underlines the robustness of the developed SOP as well as broth microdilutions as the method of choice for MIC determina tion.
- Published
- 2005
30. [Chronic musculoskeletal pain--aspects for assessment in private disability compensation (II)].
- Author
-
Schiltenwolf M and Kühn T
- Subjects
- Adult, Diagnosis, Differential, Eligibility Determination legislation & jurisprudence, Female, Germany, Humans, Male, Middle Aged, Musculoskeletal Diseases etiology, Pain etiology, Somatoform Disorders diagnosis, Somatoform Disorders etiology, Disability Evaluation, Expert Testimony legislation & jurisprudence, Musculoskeletal Diseases diagnosis, Pain diagnosis, Workers' Compensation legislation & jurisprudence
- Published
- 2005
31. [Chronic musculoskeletal pain--aspects for assessment in private disability compensation (I)].
- Author
-
Schiltenwolf M and Kühn T
- Subjects
- Chronic Disease, Comorbidity, Diagnosis, Differential, Eligibility Determination legislation & jurisprudence, Germany, Humans, Psychophysiologic Disorders diagnosis, Disability Evaluation, Expert Testimony legislation & jurisprudence, Insurance, Disability legislation & jurisprudence, Musculoskeletal Diseases diagnosis, Pain diagnosis
- Abstract
Pain is the most frequent symptom of diseases of the musculoskeletal system. Moreover pain is the most frequent complaint in applications for governmental or private disability compensation. Since pain remains a subjective sensory perception, it is the task of assessment to prove all the proband's information for consistency. Both multidimensionality of chronic pain and a high impact of psychosomatic comorbidity imply that not only orthopaedic and traumatologic but as well psychosomatic competence for legal assessment is required.
- Published
- 2004
32. Monitoring of florfenicol susceptibility among bovine and porcine respiratory tract pathogens collected in Germany during the years 2002 and 2003.
- Author
-
Kehrenberg C, Mumme J, Wallmann J, Verspohl J, Tegeler R, Kühn T, and Schwarz S
- Subjects
- Animals, Cattle, Germany, Microbial Sensitivity Tests, Population Surveillance, Swine, Anti-Bacterial Agents pharmacology, Cattle Diseases microbiology, Respiratory Tract Infections microbiology, Respiratory Tract Infections veterinary, Swine Diseases microbiology, Thiamphenicol analogs & derivatives, Thiamphenicol pharmacology
- Published
- 2004
- Full Text
- View/download PDF
33. [Proposals of the working group "Antibiotic resistance" for the configuration of microtitre plates to be used in routine antimicrobial susceptibility testing of bacterial pathogens from infections of large food-producing animals and mastitis cases].
- Author
-
Luhofer G, Böttner A, Hafez HM, Kaske M, Kehrenberg C, Kietzmann M, Klarmann D, Klein G, Krabisch P, Kühn T, Richter A, Sigge C, Traeder W, Waldmann KH, Wallmann J, Werckenthin C, and Schwarz S
- Subjects
- Animals, Bacteria growth & development, Consumer Product Safety, Germany, Humans, Mastitis drug therapy, Mastitis microbiology, Microbial Sensitivity Tests methods, Animals, Domestic microbiology, Anti-Bacterial Agents pharmacology, Bacteria drug effects, Drug Resistance, Microbial, Mastitis veterinary, Microbial Sensitivity Tests veterinary
- Abstract
Two layouts for microtitre plates, which should serve for in-vitro susceptibility testing in routine diagnostics, have been set up by the working group "Antibiotic resistance" of the German Society for Veterinary Medicine. One of these layouts was designed for the testing of bacteria from cases of mastitis and the other for bacteria from infections in large food-producing animals. The choice of the antimicrobial agents and their concentrations to be included in these layouts were based on (1) the bacteria frequently associated with the respective diseases/animals, (2) the antimicrobial agents licensed for therapeutic use in these diseases/animals, (3) the currently available breakpoints, and (4) cross-resistances between the antimicrobial agerts so far known to occur in the respective bacteria.
- Published
- 2004
34. [Sentinel lymph node biopsy in breast cancer: state of the art].
- Author
-
Bauerfeind I, Himsl I, Kühn T, Untch M, and Hepp H
- Subjects
- Breast Neoplasms drug therapy, Breast Neoplasms surgery, Carcinoma, Ductal drug therapy, Carcinoma, Ductal surgery, Carcinoma, Intraductal, Noninfiltrating drug therapy, Carcinoma, Intraductal, Noninfiltrating surgery, Chemotherapy, Adjuvant, Combined Modality Therapy, Critical Pathways, Female, Germany, Humans, Lymphatic Metastasis pathology, Neoplasm Staging, Prognosis, Breast Neoplasms pathology, Carcinoma, Ductal pathology, Carcinoma, Intraductal, Noninfiltrating pathology, Lymph Node Excision, Sentinel Lymph Node Biopsy
- Abstract
Axillary lymph node excision of level I and II with at least 10 lymph nodes is the operative gold standard for invasive breast cancer. Axillary lymph node excision is a diagnostic procedure for histopathologic tumor classification, for assessment of prognosis, local tumor control and adjuvant therapy decision. The sentinel node biopsy is a minimal-invasive procedure to determine the axillary lymph node status by excision of one or more sentinel nodes. This procedure is being increasingly implemented in breast cancer surgery. The classical axillary lymph node excision can be replaced by sentinel node biopsy if sentinel nodes are free of invasion in the intraoperative as well as in the final histopathological report. Sentinel node biopsy can become an operative routine procedure only in a quality-controlled environment.
- Published
- 2004
- Full Text
- View/download PDF
35. [Sentinel node biopsy in breast cancer. German Society for Senology defines quality standards].
- Author
-
Kühn T and Kreienberg R
- Subjects
- Breast Neoplasms surgery, Female, Germany, Humans, Lymph Node Excision, Lymphatic Metastasis, Neoplasm Staging, Breast Neoplasms pathology, Practice Guidelines as Topic, Sentinel Lymph Node Biopsy standards, Societies, Medical
- Published
- 2004
- Full Text
- View/download PDF
36. [Work disability: malignant tumors as markers of noticeable risk in occupational groups].
- Author
-
Kühn T
- Subjects
- Adult, Eligibility Determination legislation & jurisprudence, Female, Germany, Humans, Male, Middle Aged, Neoplasms epidemiology, Occupational Diseases epidemiology, Risk Assessment, Risk Factors, Social Security legislation & jurisprudence, Disability Evaluation, Neoplasms etiology, Occupational Diseases etiology
- Abstract
A risk adequate premium development of private disability insurance requires a correct valuation of the disability probability. If the reasons for disability are known, especially the share of cancer, the development of damage within a job class can be anticipated. For this a relatively small collective is enough. The new findings should be substantiated as far as possible by further analysis and can be the basis for the evaluation of disability probabilities of job classes within the business in force.
- Published
- 2000
37. [Is a current HIV test necessary in insurance related medical examinations?].
- Author
-
Kühn T
- Subjects
- Adult, Eligibility Determination legislation & jurisprudence, Germany, Humans, Male, AIDS Serodiagnosis legislation & jurisprudence, HIV Infections diagnosis, Insurance, Life legislation & jurisprudence
- Published
- 1994
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