107 results on '"Yucel, R."'
Search Results
2. Associations between race, lifecourse socioeconomic position and prevalence of diabetes among US women and men: results from a population-based panel study
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Insaf, T Z, Strogatz, D S, Yucel, R M, Chasan-Taber, L, and Shaw, B A
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- 2014
3. 50 Depression in Emergency Department Healthcare Workers During the COVID-19 Outbreak in Brooklyn, NY
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Gao, H., primary, Ma, X., additional, Apple, S., additional, Cirrone, G., additional, Huang, A., additional, Kabariti, S., additional, Saad, A., additional, Yucel, R., additional, Gustafson, D., additional, and Motov, S., additional
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- 2021
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4. 38 Posttraumatic Stress in Emergency Department Health Care Workers During the COVID-19 Outbreak in Brooklyn, New York
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Apple, S.J., primary, Wilson, J., additional, Gao, H., additional, Ma, X., additional, Saad, A., additional, Huang, A., additional, Cirrone, G., additional, Kabariti, S., additional, Yucel, R., additional, Motov, S., additional, and Gustafson, D., additional
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- 2021
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5. Are environmental pollution and biodiversity levels associated to the spread and mortality of COVID-19? A four-month global analysis
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Fernández D, Giné-Vázquez I, Liu I, Yucel R, Nai Ruscone M, Morena M, García VG, Haro JM, Pan W, and Tyrovolas S
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Air quality ,COVID-19 ,Transmission ,Global ,Biodiversity ,Mortality - Abstract
On March 12th, 2020, the WHO declared COVID-19 as a pandemic. The collective impact of environmental and ecosystem factors, as well as biodiversity, on the spread of COVID-19 and its mortality evolution remain empirically unknown, particularly in regions with a wide ecosystem range. The aim of our study is to assess how those factors impact on the COVID-19 spread and mortality by country. This study compiled a global database merging WHO daily case reports with other publicly available measures from January 21st to May 18th, 2020. We applied spatio-temporal models to identify the influence of biodiversity, temperature, and precipitation and fitted generalized linear mixed models to identify the effects of environmental variables. Additionally, we used count time series to characterize the association between COVID-19 spread and air quality factors. All analyses were adjusted by social demographic, country-income level, and government policy intervention confounders, among 160 countries, globally. Our results reveal a statistically meaningful association between COVID-19 infection and several factors of interest at country and city levels such as the national biodiversity index, air quality, and pollutants elements (PM(10,) PM(2.5)(,) and O(3)). Particularly, there is a significant relationship of loss of biodiversity, high level of air pollutants, and diminished air quality with COVID-19 infection spread and mortality. Our findings provide an empirical foundation for future studies on the relationship between air quality variables, a country's biodiversity, and COVID-19 transmission and mortality. The relationships measured in this study can be valuable when governments plan environmental and health policies, as alternative strategy to respond to new COVID-19 outbreaks and prevent future crises.
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- 2021
6. A Weakened Immune Response to Synthetic Exo-Peptides Predicts a Potential Biosecurity Risk in the Retrieval of Exo-Microorganisms
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Schaefer, K.U., Dambuza, I.M., Dall'Angelo, Sergio, Yucel, R., Jaspars, Marcel, Trembleau, Laurent, Netea, M.G., Gow, Neil A. R., Schaefer, K.U., Dambuza, I.M., Dall'Angelo, Sergio, Yucel, R., Jaspars, Marcel, Trembleau, Laurent, Netea, M.G., and Gow, Neil A. R.
- Abstract
Contains fulltext : 221642.pdf (publisher's version ) (Open Access)
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- 2020
7. Antifungal Activity of Antimicrobial Peptides and Proteins against Aspergillus fumigatus
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Ballard, E., Yucel, R., Melchers, W.J.G., Brown, A.J., Verweij, P.E., Warris, A., Ballard, E., Yucel, R., Melchers, W.J.G., Brown, A.J., Verweij, P.E., and Warris, A.
- Abstract
Contains fulltext : 220030.pdf (publisher's version ) (Open Access), Antimicrobial peptides and proteins (AMPs) provide an important line of defence against invading microorganisms. However, the activity of AMPs against the human fungal pathogen Aspergillus fumigatus remains poorly understood. Therefore, the aim of this study was to characterise the anti-Aspergillus activity of specific human AMPs, and to determine whether A. fumigatus can possess resistance to specific AMPs, as a result of in-host adaptation. AMPs were tested against a wide range of clinical isolates of various origins (including cystic fibrosis patients, as well as patients with chronic and acute aspergillosis). We also tested a series of isogenic A. fumigatus isolates obtained from a single patient over a period of 2 years. A range of environmental isolates, obtained from soil in Scotland, was also included. Firstly, the activity of specific peptides was assessed against hyphae using a measure of fungal metabolic activity. Secondly, the activity of specific peptides was assessed against germinating conidia, using imaging flow cytometry as a measure of hyphal growth. We showed that lysozyme and histones inhibited hyphal metabolic activity in all the A. fumigatus isolates tested in a dose-dependent fashion. In addition, imaging flow cytometry revealed that histones, beta-defensin-1 and lactoferrin inhibited the germination of A. fumigatus conidia.
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- 2020
8. Ovarian follicular fluid: an innovative approach to assess internal dose for reproductive epidemiology
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Bloom, M. S., primary, Butts, C. D., additional, McGough, A., additional, Lenhart, N., additional, Wong, R., additional, Mok-Lin, E., additional, Parsons, P. J., additional, Galusha, A. L., additional, Yucel, R. M., additional, Browne, R. W., additional, and Fujimoto, V. Y., additional
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- 2020
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9. A practical procedure for customizable one-way sensitivity analysis in additive value models
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Chambal, Stephen P., Weir, Jeffery D., Kahraman, Yucel R., and Gutman, Alex J.
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Decision-making ,Business - Abstract
Although a wide variety of sensitivity analysis methods for additive value models appear in the literature, the most commonly used and easily understood is one-way sensitivity analysis. We address concerns [...]
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- 2011
10. Oxidative stress in human in sustained and white coat hypertension
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CANER, M., KARTER, Y., UZUN, H., ÇURGUNLU, A., VEHID, S., BALCI, H., YUCEL, R., GÜNER, I., KUTLU, A., YALDIRAN, A., and ÖZTÜRK, E.
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- 2006
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11. Light, entrainment and alertness: A case study in offices
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Figueiro, MG, primary, Steverson, B, additional, Heerwagen, J, additional, Yucel, R, additional, Roohan, C, additional, Sahin, L, additional, Kampschroer, K, additional, and Rea, MS, additional
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- 2019
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12. The impact of missing toxicology reports on overdose death surveillance: 2010-2016
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Tote, K.M., primary, Bradley, H., additional, Martin, E.G., additional, Yucel, R., additional, and Rosenberg, E.S., additional
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- 2019
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13. Light, entrainment and alertness: A case study in offices.
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Figueiro, MG, Steverson, B, Heerwagen, J, Yucel, R, Roohan, C, Sahin, L, Kampschroer, K, and Rea, MS
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WAKEFULNESS ,BIOLOGICAL rhythms ,OFFICE environment ,VISIBLE spectra ,DAYLIGHT ,EYE ,LABORATORIES - Abstract
It is well established that light affects both visual and non-visual systems. Laboratory studies have shown that, depending upon the time of exposure, short-wavelength light of sufficient amount and exposure duration will either entrain or disrupt the synchrony between our biological clock and our local position on Earth. Laboratory studies have also shown that light across the entire visible spectrum can enhance alertness, both day and night. Scant attention has been given to testing the effects of light on building occupants' non-visual responses, and, consequently, lighting specifiers have been offered little guidance on the design and application of lighting for non-visual effects. The present study helps to fill that gap through field-testing of light exposures from a novel luminaire designed to promote entrainment and alertness throughout the day in actual office environments. The data support the inference that light exposures, when properly applied, can promote circadian entrainment and increase alertness. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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14. A Practical Procedure for Customizable One-Way Sensitivity Analysis in Additive Value Models
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Jeffery D. Weir, Yucel R. Kahraman, Stephen P. Chambal, and Alex J. Gutman
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business.industry ,Computer science ,Weight change ,General Decision Sciences ,Machine learning ,computer.software_genre ,Decision maker ,Decision context ,Group decision-making ,Attribute weight ,Value focused thinking ,Artificial intelligence ,Data mining ,business ,computer ,Analysis method ,Decision analysis - Abstract
Although a wide variety of sensitivity analysis methods for additive value models appear in the literature, the most commonly used and easily understood is one-way sensitivity analysis. We address concerns from practice with this traditional method and build the mathematical foundation for a new and robust one-way sensitivity analysis approach that enables the decision maker(s) to gain a greater ownership of the model. A traditional one-way sensitivity analysis varies one attribute weight while keeping all others proportionally constant; although useful, it also has limitations, particularly in group decision making. Our proposed methodology, customizable one-way sensitivity analysis (COSA), retains the simplicity of the traditional method but extends it to a more powerful form. COSA allows the decision maker(s) to tailor the sensitivity analysis to the desired decision context by assigning weight coefficients of elasticity to the attribute weights. These parameters let the decision maker choose how the adjusted weight change is distributed throughout the model. Furthermore, we provide a detailed discussion about performing sensitivity analysis on complex hierarchies with more than one tier and include an applied example to demonstrate COSA's usefulness. Overall, a consistent standard for the one-way sensitivity analysis of additive value models is provided for the decision analysis community.
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- 2011
15. Associations between follicular fluid high density lipoprotein particle components and embryo quality among in vitro fertilization patients
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Kim, K., primary, Bloom, M. S., additional, Browne, R. W., additional, Bell, E. M., additional, Yucel, R. M., additional, and Fujimoto, V. Y., additional
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- 2016
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16. Joint GEEs for multivariate correlated data with incomplete binary outcomes
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Inan, G., primary and Yucel, R., additional
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- 2016
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17. Joint GEEs for multivariate correlated data with incomplete binary outcomes.
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Inan, G. and Yucel, R.
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MULTIPLE imputation (Statistics) , *MATHEMATICAL variables , *BIG data , *MONTE Carlo method , *COEFFICIENTS (Statistics) - Abstract
This study considers a fully-parametric but uncongenial multiple imputation (MI) inference to jointly analyze incomplete binary response variables observed in a correlated data settings. Multiple imputation model is specified as a fully-parametric model based on a multivariate extension of mixed-effects models. Dichotomized imputed datasets are then analyzed using joint GEE models where covariates are associated with the marginal mean of responses with response-specific regression coefficients and a Kronecker product is accommodated for cluster-specific correlation structure for a given response variable and correlation structure between multiple response variables. The validity of the proposed MI-based JGEE (MI-JGEE) approach is assessed through a Monte Carlo simulation study under different scenarios. The simulation results, which are evaluated in terms of bias, mean-squared error, and coverage rate, show that MI-JGEE has promising inferential properties even when the underlying multiple imputation is misspecified. Finally, Adolescent Alcohol Prevention Trial data are used for illustration. [ABSTRACT FROM PUBLISHER]
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- 2017
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18. Associations between race, lifecourse socioeconomic position and prevalence of diabetes among US women and men: results from a population-based panel study
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Insaf, T Z, primary, Strogatz, D S, additional, Yucel, R M, additional, Chasan-Taber, L, additional, and Shaw, B A, additional
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- 2013
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19. Robust Sensitivity Analysis for Multi-Attribute Deterministic Hierarchical Value Models
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AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH, Kahraman, Yucel R., AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH, and Kahraman, Yucel R.
- Abstract
There is a wide array of multi-attribute decision analysis methods and associated sensitivity analysis procedures in the literature. However, there is no detailed discussion of sensitivity analysis methods solely relating to additive hierarchical value models. The currently available methodology in the literature is unsophisticated and can be hard to implement into complex models. The methodology proposed in this research builds mathematical foundations for a robust sensitivity analysis approach and extends the current methodology to a more powerful form. The new methodology is easy to implement into complex hierarchical value models and gives flexible and dynamic capabilities to decision makers during sensitivity analysis. The mathematical notation is provided in this study along with applied examples to demonstrate this methodology. Global and local sensitivity analysis are considered and implemented using the proposed robust technique. This research provides consistency and a common standard for the decision analysis community for sensitivity analysis of multi-attribute deterministic hierarchical value models.
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- 2002
20. Mixed modeling and multiple imputation for unobservable genotype clusters
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Foulkes, A. S., primary, Yucel, R., additional, and Reilly, M. P., additional
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- 2007
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21. Treatment of canine hip dysplasia using triple pelvic osteotomy
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Altunatmaz, K., primary, Yucel, R., additional, Devecioglu, Y., additional, Saroglu, M., additional, and Ozsoy, S., additional
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- 2003
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22. Doppler velocimetry of the uterine arteries after hysteroscopic rollerball endometrial ablation
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Bahceci, M., primary, Demirel, L. C., additional, Aksoy, E., additional, Iscan, S., additional, and Yucel, R., additional
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- 1998
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23. Mixed modeling and multiple imputation for unobservable genotype clusters.
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Foulkes, A. S., Yucel, R., and Reilly, M. P.
- Abstract
Understanding the genetic contributions to complex diseases will require consideration of interaction across multiple genes and environmental factors. At the same time, capturing information on allelic phase, that is, whether alleles within a gene are in cis (on the same chromosome) or in trans (on different chromosomes), is critical when using haplotypic approaches in disease association studies. This paper proposes a combination of mixed modeling and multiple imputation for assessing high-order genotype-phenotype associations while accounting for the uncertainty in phase inherent in population-based association studies. This method provides a flexible statistical framework for controlling for potential confounders and assessing gene-environment and gene-gene interactions in studies of unrelated individuals where the haplotypic phase is generally unobservable. The proposed method is applied to a cohort of 626 subjects with human immunodeficiency virus (HIV) to assess the potential contribution of four genes, apolipoprotein-C-III, apolipoprotein-E, endothelial lipase and hepatic lipase in predicting lipid abnormalities. A simulation study is also presented to describe the method performance. Copyright © 2007 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]
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- 2008
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24. Profiling providers on use of adjuvant chemotherapy by combining cancer registry and medical record data.
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Zheng H, Yucel R, Ayanian JZ, Zaslavsky AM, Zheng, Hui, Yucel, Recai, Ayanian, John Z, and Zaslavsky, Alan M
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Purpose: Treatment information collected by cancer registries can be used to monitor the provision of guideline-recommended chemotherapy to colorectal cancer patients. Incomplete information may bias comparisons of these rates. We developed statistical methods that combine data from a registry and physicians' records to assess hospital quality.Data: From California Cancer Registry data, we selected all patients (n=12,594) newly diagnosed with stage III colon cancer or stage II or III rectal cancer from 428 hospitals during the years 1994 to 1998. To assess rates and predictors of underreporting of chemotherapy, we surveyed physicians treating 1449 of these patients from 98 hospitals during the years 1996 to 1997.Methods: Using Bayesian statistical models, we imputed unobserved treatments. We studied the impact of underreporting on provider profiling by comparing rankings, estimates, and credible intervals based only on registry data to those incorporating physician survey data.Results: Analyses that account for incompleteness of reporting yielded wider credible intervals for provider profiles than those that ignored such incompleteness. Among the 109 (25%) hospitals in the highest quartile of chemotherapy rates according to the registry data, 16 were not so classified when incomplete reporting was taken into account. With the more comprehensive model, 12 hospitals could be identified that ranked in the top quartile with probability>0.90.Conclusion: Estimates of adjusted hospital chemotherapy rates based solely on cancer registry data overstate the precision of assessments of hospital quality. Using additional information from a physician survey and applying rigorous statistical models, better inferences can be drawn about provider quality. [ABSTRACT FROM AUTHOR]- Published
- 2006
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25. Oxidative stress in white coat hypertension; role of paraoxonase.
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Uzun, H., Karter, Y., Aydin, S., Curgunlu, A., Simsek, G., Yucel, R., Vehiyd, S., Erturk, N., Kutlu, A., Benian, A., Yaldiran, A., Oztuk, E., and Erdine, S.
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HYPERTENSION ,OXIDATIVE stress ,LOW density lipoproteins ,MALONDIALDEHYDE ,PARAOXONASE ,BLOOD pressure - Abstract
Oxidative stress in sustained hypertension was shown with several biochemical parameters. Oxidized low-density lipoprotein (oxLDL) plays an important role during the atherosclerosis process and paraoxonase (PON1) can significantly inhibit lipid peroxidation. Serum PON1 activity, oxLDL and malondialdehyde (MDA) concentrations and their relationship with serum lipid parameters and systolic and diastolic blood pressures (SBP and DBP) were determined in subjects with white coat hypertension (WCH), sustained hypertension (HT) and normotension (NT). The study group consisted of a total of 86 subjects, 30 with WCH (14 male, 16 female subjects), 30 with HT (13 male, 17 female subjects) and 26 with NT (12 male, 14 female subjects). Both white coat hypertensive and hypertensive subjects had significantly higher levels of MDA than normotensives (P<0.026 and P<0.001, respectively). The oxLDL level of the HT group was significantly higher than the NT group (P<0.023). The WCH group had an oxLDL level similar to both hypertensive and normotensive groups. HT and WCH groups had significantly lower PON1 levels than the normotensive group (P<0.001). oxLDL correlated with MDA positively (P=0.008), and PON1 negatively (P=0.008). A negative correlation between MDA and PON1 (P=0.014) was detected. MDA correlated positively with both SBP and DBP (P=0.001), while PON1 correlated with both of them negatively (P=0.01 and P=0.008, respectively). OxLDL correlated with diastolic blood pressure positively (P=0.008). Our data demonstrate that oxidative stress increase in WCH is associated with a decrease in PON1 activity. The reduction in PON1 activity may be one of the factors leading to an increase in oxidative status in WCH.Journal of Human Hypertension (2004) 18, 523-528. doi:10.1038/sj.jhh.1001697 Published online 26 February 2004 [ABSTRACT FROM AUTHOR]
- Published
- 2004
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26. Reduction of peak to average power ratio in OFDM systems by the method of maximum symbol control.
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Yucel, R. and Safak, M.
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- 2004
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27. Oxidation of serum low density lipoprotein in experimental hyperthyroidism; role of paraoxonase
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Simsek, G., Remise Gelisgen, Yucel, R., Dariyerli, N., Genc, H., Karter, Y., Simsek, C., and Uzun, H.
28. Bone metabolism in ovariectomized rats with induced hyperthyroidism: The effect of estrogen replacement
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Sozer, V., Hafize Uzun, Guner, I., Aydin, S., Yucel, R., Karter, Y., Simsek, C., Kaya, S., Yigit, G., and Simsek, G.
29. Robust Sensitivity Analysis for Multi-Attribute Deterministic Hierarchical Value Models
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Kahraman, Yucel R. and Kahraman, Yucel R.
30. Erythrocyte osmotic fragility and lipid peroxidation in experimental hyperthyroidism.
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Dariyerli, N., Yucel, R., Ozdemir, S., Toplan, S., Akyolcu, M., and Yigit, G.
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ERYTHROCYTES , *METABOLISM , *ANTIOXIDANTS - Abstract
Erythrocyte osmotic fragility and lipid peroxidation in experimental hyperthyroidism Thyroid hormones have multifaceted effects on humans. Among others, they influence the basal metabolic rate; the overproduction of thyroid gland hormones results in an increased rate of metabolism and oxygen consumption by cells. Increased thyroid hormone concentrations affect the oxidant/ antioxidant equilibrium and may cause harm to the cell. Thyroid hormones, while leading to increase in free radicals also activate the antioxidant enzymes. The purpose of this study is to determine the structural integrity of red blood cells in experimental hyperthyroidism by assessing the osmotic fragility of erythrocytes in primary hyperthyroidism and its relation between lipid peroxidation. In this study, twenty-two Spraque-Dawley-type female rats weighing between 160 and 200 g were divided into two, as control (n=10) and experimental (n=12), groups. The experimental group animals have received tap water and L-Tiroksin (0.4 mg/100 g fodder) added standard fodder for 30 days to induce hyperthyroidism. Control group animals were fed tap water and standard fodder for the same period. At the end of the experimental period, blood samples were drawn from the abdominal aorta of the rats under light ether anesthesia. Triiodothyronine (T3), thyroxine (T4), and thyroid stimulant hormone (TSH) levels, osmotic fragility, malondialdehyde (MDA), glutathione (GSH) levels and superoxide dismutase (SOD) activity were measured. Statistical analysis was done by Mann-Whitney U test. Data were expressed as means ±SD. Differences between groups were considered significant at the (p<0.05) level. The statistically significant increase in T3, T4 and the significant decrease in TSH) of experimental group is the evidence of induced primary hyperthyroidism. There was a statistically significant increase found in erythrocyte MDA(p<0.001) levels, and SOD activity (p<0.001), but statistically a significant decrease was detected in GSH (p<0.05) levels in hyperthyroid group when compared to controls. In the controls, the osmotic fragility levels were found to be maximum at 0.32 % NaCl and minimum at 0.56 % NaCl, whereas in experimental group reached a maximum at 0.40 % NaCl and minimum at 0.64 %. When statistical evaluations were compared, statistically important increases were detected in maximum and minimum osmotic fragility limits between both the groups (p<0.001). This finding, which shows maximum hemolysis ratio, is the evidence of increased osmotic fragility of the erythrocytes in hyperthyroidism. As a result of our study, it may be concluded that hyperthyroidism may led to an increase in osmotic fragility of erythrocytes and this situation may possibly originate from the increased lipid peroxidation in hyperthyroidism. [ABSTRACT FROM AUTHOR]
- Published
- 2013
31. Effects of flurbiprofen and tiaprofenic acid on oxidative stress markers in osteoarthritis: a prospective, randomized, open-label, active- and placebo-controlled trial [corrected] [published erratum appears in CURR THER RES 2006 Mar-Apr;67(2):157].
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Tuzun S, Uzun H, Aydin S, Dinc A, Sipahi S, Topcuoglu MA, Yucel R, and Belce A
- Abstract
Background:The relationship between oxidative stress and osteoarthritis (OA) has been widely investigated. Serum malondialdehyde (MDA), nitric oxide (NO), and Cu/Zn superoxide dismutase (SOD) levels are useful markers of oxidative stress. Because of the importance of oxidative stress markers in the pathogenesis of OA, treatment might involve modification of these markers to control oxidative stress.Objective:The aim of this study was to compare the effects of 2 conventionalNSAIDs on markers of oxidative stress in patients with OA of the knee.Methods:This 3-week, prospective, randomized, open-label, active- and placebo-controlled study was conducted at the Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey. Adult patients with clinically and radiographically diagnosed moderate OA of the knee who were previously untreated were enrolled. Patients were randomly assigned to 1 of 3 treatment groups: flurbiprofen 100 mg PO (tablets) BID, tiaprofenic acid 300 mg PO (tablets) BID, or placebo tablets BID. Patients were evaluated using clinical assessment and laboratory testing before treatment (week 0; baseline) and at the end of week 3. The primary end points were the differences in serum MDA, NO, and SOD levels versus placebo. Clinical parameters-pain at rest and on motion-were evaluated using a 10-cm visual analog scale (0 = no pain to 10 = worst pain imaginable). The duration (in minutes) of morning stiffness was recorded by patients, using patient diaries. The differences between treatment groups were assessed using multivariate analysis.Results:Thirty-nine patients (20 women, 19 men; mean [SD] age, 59.0 [11.3] years) were included in the study. Mean serum MDA and NO levels were significantly decreased at 3 weeks compared with baseline in the 2 active-treatment groups (all, P < 0.001); these values remained statistically similar to baseline in the placebo group. Serum SOD levels were increased significantly from baseline in the 2 active-treatment groups (both, P < 0.001), but not in the placebo group. No significant differences in serum MDA and NO levels were found between the group receiving flurbiprofen and that receiving tiaprofenic acid. Serum SOD levels were significantly higher in the flurbiprofen group compared with the tiaprofenic acid and placebo groups (both, P < 0.01). The mean (SD) score for pain at rest was significantly lower at 3 weeks compared with baseline with flurbiprofen and tiaprofenic acid (both, P < 0.001), but not with placebo. The mean score for pain on motion was significantly reduced from baseline values only with tiaprofenic acid (P < 0.001). The duration of morning stiffness was significantly shorter at 3 weeks compared with baseline in all 3 study groups (all, P < 0.001). The mean scores for pain on motion and duration of morning stiffness were significantly reduced with tiaprofenic acid compared with placebo (both, P < 0.05). The study had some limitations (ie, small sample size, no blinding, the short duration of the study, and the weak correlation between serum and synovial fluid levels of NO).Conclusions:In this comparison of the effects of 3 weeks of treatment withflurbiprofen 100 mg BID and tiaprofenic acid 300 mg BID in patients with knee OA, both treatments effectively reduced serum MDA and NO levels compared with placebo. Only tiaprofenic acid significantly improved pain at rest and on motion and duration of morning stiffness compared with placebo. [ABSTRACT FROM AUTHOR]
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- 2005
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32. Factors Associated with Corticosteroid Adherence in Sarcoidosis.
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Judson MA, Ouedraogo WO, Fish KM, DeLuca R, VanCavage R, Sirigaddi K, and Yucel R
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- Humans, Female, Male, Middle Aged, Adult, Sarcoidosis drug therapy, Sarcoidosis psychology, Prednisone therapeutic use, Prednisone adverse effects, Patient Reported Outcome Measures, Adrenal Cortex Hormones therapeutic use, Adrenal Cortex Hormones adverse effects, Adrenal Cortex Hormones administration & dosage, Glucocorticoids therapeutic use, Glucocorticoids adverse effects, Sarcoidosis, Pulmonary drug therapy, Sarcoidosis, Pulmonary psychology, Aged, Medication Adherence, Physician-Patient Relations, Health Knowledge, Attitudes, Practice
- Abstract
Purpose: We measured corticosteroid medication adherence (CMA) in sarcoidosis patients and analyzed if demographic and clinical factors, beliefs about medications, corticosteroid side-effects, psychosocial status, and the doctor-patient relationship were associated with corticosteroid adherence., Methods: Sarcoidosis patients receiving corticosteroids were eligible to participate. CMA was measured using the Medication Adherence Response Scale-10 (MARS-10), a validated patient reported outcome measure (PRO). Data collection included patient demographics and clinical variables to assess their sarcoidosis phenotype. The patients were administered additional PROs concerning their psychosocial status, beliefs about medication use, corticosteroid side-effects and the strength of their doctor-patient relationship., Results: 132 patients were enrolled. Their mean prednisone dose was 9.9 ± 7.5 mg/day. 75% (99/132) were adherent with corticosteroids (MARS-10 ≥ 6) and 25% (33/132) were nonadherent (MARS-10 < 6). All demographic features, education level, and annual family income were not associated with CMA. Most clinical variables including spirometry, use of additional sarcoidosis drugs, number of organs involved with sarcoidosis were not associated with CMA. Almost all PROs including a better attitude toward medication use, less psychological issues, less corticosteroid side-effects, and a stronger doctor-patient relationship were associated with better CMA. A multi-logistic regression found that patient-doctor communication and the patient's intrinsic beliefs about the use of medications remained associated with CMA., Conclusion: We found no significant relationship between demographic or socioeconomic factors and CMA. Few clinical factors were associated with CMA. In a univariate analysis, CMA was associated with physician-doctor communication, beliefs about medication use, psychological/emotional issues, and corticosteroid side-effects. Only the first two of these factors remained associated with CMA in a multi-logistic analysis. These data suggest that CMA is heavily influenced by sarcoidosis patient beliefs about medications, and less so by patient demographics., (© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
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- 2024
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33. Blood DNA methylation in post-acute sequelae of COVID-19 (PASC): a prospective cohort study.
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Balnis J, Madrid A, Drake LA, Vancavage R, Tiwari A, Patel VJ, Ramos RB, Schwarz JJ, Yucel R, Singer HA, Alisch RS, and Jaitovich A
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- Humans, Female, Male, Middle Aged, Prospective Studies, Adult, Aged, Post-Acute COVID-19 Syndrome, Machine Learning, Whole Genome Sequencing, Biomarkers blood, Quality of Life, Betacoronavirus genetics, DNA Methylation, COVID-19 genetics, COVID-19 blood, COVID-19 virology, SARS-CoV-2 genetics
- Abstract
Background: DNA methylation integrates environmental signals with transcriptional programs. COVID-19 infection induces changes in the host methylome. While post-acute sequelae of COVID-19 (PASC) is a long-term complication of acute illness, its association with DNA methylation is unknown. No universal blood marker of PASC, superseding single organ dysfunctions, has yet been identified., Methods: In this single centre prospective cohort study, PASC, post-COVID without PASC, and healthy participants were enrolled to investigate their symptoms association with peripheral blood DNA methylation data generated with state-of-the-art whole genome sequencing. PASC-induced quality-of-life deterioration was scored with a validated instrument, SF-36. Analyses were conducted to identify potential functional roles of differentially methylated loci, and machine learning algorithms were used to resolve PASC severity., Findings: 103 patients with PASC (22.3% male, 77.7% female), 15 patients with previous COVID-19 infection but no PASC (40.0% male, 60.0% female), and 27 healthy volunteers (48.1% male, 51.9% female) were enrolled. Whole genome methylation sequencing revealed 39 differentially methylated regions (DMRs) specific to PASC, each harbouring an average of 15 consecutive positions, that differentiate patients with PASC from the two control groups. Motif analyses of PASC-regulated DMRs identify binding domains for transcription factors regulating circadian rhythm and others. Some DMRs annotated to protein coding genes were associated with changes of RNA expression. Machine learning support vector algorithm and random forest hierarchical clustering reveal 28 unique differentially methylated positions (DMPs) in the genome discriminating patients with better and worse quality of life., Interpretation: Blood DNA methylation levels identify PASC, stratify PASC severity, and suggest that DNA motifs are targeted by circadian rhythm-regulating pathways in PASC., Funding: This project has been funded by the following agencies: NIH-AI173035 (A. Jaitovich and R. Alisch); and NIH-AG066179 (R. Alisch)., Competing Interests: Declaration of interests AM, RA and AJ share pending patent application (20220364187): “Detecting, predicting severity of, and/or predicting treatment response to respiratory virus infection”., (Copyright © 2024 The Author(s). Published by Elsevier B.V. All rights reserved.)
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- 2024
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34. Longitudinal Evaluation of Cepstral Peak Prominence in Children.
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Heller Murray E and Yucel R
- Abstract
Objectives: To evaluate whether the acoustic measure of cepstral peak prominence changes during typical development in children 2-7., Methods: Data were retrospectively analyzed from the Arizona Child Acoustic Database Repository in this longitudinal cohort study. The Repository contains longitudinal data recordings from 63 total children between 2 and 7 years of age. Thirty-one children met the inclusion criteria for the current analysis (at least five time points of usable speech data, no history of speech or language difficulties, no significant dysphonia, and were monolingual speakers of American English). Cepstral peak prominence measures were calculated in Praat for each child, at each timepoint. Additional acoustic measures of vocal fundamental frequency, vocal intensity, and stimuli length were also calculated. These measures were chosen as previous work has shown they may impact cepstral peak prominence values., Results: Linear mixed-effects regression models examined the relationship between cepstral peak prominence and age, after controlling for vocal fundamental frequency, vocal intensity, and stimuli length. Within-participant effects of age were found, indicating a trajectory change in which cepstral peak prominence increases with age in this population. This positive relationship between a cepstral peak prominence and age was nonlinear, with a steeper slope between age and cepstral peak prominence after 5 years of age., Conclusions: This is the first study to examine the typical developmental trajectory of cepstral peak prominence children between 2 and 7 years, a critical period of vocal development. Cepstral peak prominence increased with age, suggesting an increase in periodicity of vocal fold vibration that coincides with the significant vocal fold structural changes occurring during this time. Outcomes present important normative information on vocal development, essential for effectively understanding the difference between what vocal changes are part of normative development and what changes indicate a voice disorder., 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 © 2024 The Voice Foundation. Published by Elsevier Inc. All rights reserved.)
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- 2024
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35. Plasma Biomarkers of Alzheimer Disease in Women With and Without HIV.
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Li X, Yucel R, Clervius H, Kamalakar K, Zetterberg H, Blennow K, Zhang J, Adimora A, Collins LF, Fischl M, Kassaye S, Maki P, Seaberg E, Sharma A, Vance D, and Gustafson DR
- Subjects
- Female, Humans, Cohort Studies, Prospective Studies, Biomarkers, Alzheimer Disease, HIV Infections complications
- Abstract
Importance: Blood-based biomarkers associated with increased risk of Alzheimer disease (AD) are understudied in people living with and without HIV, particularly women., Objective: To determine whether baseline or 1-year changes in plasma amyloid-β40 (Aβ40), Aβ42, ratio of Aβ42 to Aβ40, total tau (t-tau), phosphorylated tau 231 (p-tau231), glial fibrillary acidic protein (GFAP), and/or neurofilament light chain (NFL) are associated with neuropsychological performance (NP) among women living with HIV (WLWH) and women living without HIV (WLWOH)., Design, Setting, and Participants: This longitudinal, prospective, cohort study with 1-year repeated clinical measures (NP only measured once) and biospecimen collection occurred between 2017 and 2019. Participants were women aged 40 years or older from 10 clinical research sites in cities across the US that were part of the Women's Interagency HIV Study. Data analysis was conducted from April to December 2022., Exposure: Laboratory-confirmed HIV status and AD biomarkers., Main Outcomes and Measures: Sociodemographically adjusted NP T-scores (attention and working memory, executive function, processing speed, memory, learning, verbal fluency, motor function, and global performance) were the primary outcomes. Baseline and 1-year fasting plasma Aβ40, Aβ42, t-tau, p-tau231, GFAP, and NFL levels were measured and analyzed using multivariable linear regression., Results: The study consisted of 307 participants (294 aged ≥50 years [96%]; 164 African American or Black women [53%]; 214 women with a high school education or higher [70%]; 238 women who were current or former smokers [78%]; and 236 women [77%] who were overweight or obese [body mass index >25]) including 209 WLWH and 98 WLWOH. Compared with WLWOH at baseline, WLWH performed worse on learning (mean [SD] T-score 47.8 [11.3] vs 51.4 [10.5]), memory (mean [SD] T-score 48.3 [11.6] vs 52.4 [10.2]), verbal fluency (mean [SD] T-score 48.3 [9.8] vs 50.7 [8.5]), and global (mean [SD] T-score 49.2 [6.8] vs 51.1 [5.9]) NP assessments. Baseline median Aβ40, GFAP, and NFL levels were higher among WLWH vs WLWOH. There were no differences in 1-year biomarker change by HIV serostatus. Lower learning, memory, and motor NP were associated with 1-year Aβ40 increase; lower learning and motor with Aβ42 increase; lower motor with p-tau231 increase; and lower processing speed, verbal fluency and motor with NFL increase in the entire sample. Among WLWH, a 1-year increase in Aβ40 from baseline to follow-up was associated with worse learning, memory, and global NP; a 1-year increase in t-tau with worse executive function; and a 1-year increase in NFL with worse processing speed. Among WLWOH, a 1-year increase in Aβ40 and Aβ42 were associated with poorer memory performance and NFL was associated with poorer motor performance., Conclusions and Relevance: These findings suggest that increases in certain plasma AD biomarkers are associated with NP in WLWH and WLWOH and may be associated with later onset of AD, and measuring these biomarkers could be a pivotal advancement in monitoring aging brain health and development of AD among women with and without HIV.
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- 2023
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36. Peripheral Blood Omics and Other Multiplex-based Systems in Pulmonary and Critical Care Medicine.
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Balnis J, Lauria EJM, Yucel R, Singer HA, Alisch RS, and Jaitovich A
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- Humans, Forecasting, Machine Learning, Critical Care
- Abstract
Over the last years, the use of peripheral blood-derived big datasets in combination with machine learning technology has accelerated the understanding, prediction, and management of pulmonary and critical care conditions. The goal of this article is to provide readers with an introduction to the methods and applications of blood omics and other multiplex-based technologies in the pulmonary and critical care medicine setting to better appreciate the current literature in the field. To accomplish that, we provide essential concepts needed to rationalize this approach and introduce readers to the types of molecules that can be obtained from the circulating blood to generate big datasets; elaborate on the differences between bulk, sorted, and single-cell approaches; and the basic analytical pipelines required for clinical interpretation. Examples of peripheral blood-derived big datasets used in recent literature are presented, and limitations of that technology are highlighted to qualify both the current and future value of these methodologies.
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- 2023
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37. The Relationship Between Serum Angiotensin Converting Enzyme Level and the Decision to Escalate Treatment of Sarcoidosis.
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Shkolnik B, Sore R, Salick M, Kobbari G, Ghalib S, Parimi AS, Fish KM, Deluca R, Yucel R, and Judson MA
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- Humans, Prednisone therapeutic use, Retrospective Studies, Lung, Peptidyl-Dipeptidase A, Sarcoidosis diagnosis, Sarcoidosis drug therapy
- Abstract
Purpose: We performed a retrospective analysis of a sarcoidosis cohort who had sACE obtained at their initial clinic visit, but the treating physician was blinded to the results. We examined the relationship between sACE and the treating physician's decision to escalate sarcoidosis treatment., Methods: Treatment was considered escalated if the prednisone dose was increased or if the prednisone dose was not changed but an additional anti-sarcoidosis drug was added or the dose was increased., Results: 561 sarcoidosis patients were analyzed. The most common target organ was the lung (84%). Using a cut-off of > 82 units/L for an elevated sACE, 31/82 (38%) with an elevated sACE had treatment escalation whereas 91/497 (18%) had treatment escalation with a normal sACE (p < 0.0001). For the need of treatment escalation, a sACE (cut-off of > 82) had sensitivity 0.25, specificity 0.89, positive predictive value 0.38, negative predictive value 0.81. These results were not appreciably different using other sACE cut-off values such as 70, 80, 90, or 100. A multivariable logistic regression model that included demographics, the target organ, spirometry results estimated that sACE level and lower FVC were significantly associated with the likelihood of treatment escalation. These findings held when sACE > 82 replaced sACE level in the multivariable logistic regression model., Conclusions: Although there was a strong correlation between sACE at the initial sarcoidosis clinic visit and subsequent treatment escalation of sarcoidosis, the predictive power was such that sACE is not adequately reliable to be used in isolation to make this determination., (© 2023. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
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- 2023
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38. Maternal and Paternal Household Pesticide Exposure During Pregnancy and Risk of Childhood Acute Lymphoblastic Leukemia.
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Ruth AL, Rehman U, Stewart P, Moore LE, Yucel R, and Taylor Wilson R
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- Child, Male, Pregnancy, Female, Humans, Infant, Risk Factors, Paternal Exposure adverse effects, Maternal Exposure adverse effects, Case-Control Studies, Prenatal Exposure Delayed Effects chemically induced, Prenatal Exposure Delayed Effects epidemiology, Pesticides toxicity, Precursor Cell Lymphoblastic Leukemia-Lymphoma chemically induced, Precursor Cell Lymphoblastic Leukemia-Lymphoma epidemiology
- Abstract
Objective: The aim of this study was to investigate whether risk estimates for childhood acute lymphoblastic leukemia change when restricting model comparison groups to "nonpesticide exposure" (NPE10) households., Methods: Cases ( n = 1810) 15 years or younger were identified through Children's Cancer Group institutions between 1989 and 1993 and age-/sex-matched to controls ( n = 1951). Household pesticide use during pregnancy/month prior was collected via telephone. NPE10 comparison group reporting no parental exposure to 10 pesticide classes was identified., Results: Adjusted odds ratios increased from 15% to 49% when limiting the comparison to NPE10. Maternal termite insecticide exposure was associated with greatest risk (adjusted odds ratio, 4.21; 95% confidence interval, 2.00-8.88). There was minimal evidence of interaction by child sex or occupational pesticide exposure, and no monotonic dose-response pattern with frequency of use (times per year)., Conclusions: Elevated risks are consistent with published pooled-/meta-analyses and DNA damage. The consistency and magnitude of these associations warrant product labeling, exposure reduction interventions, or both., Competing Interests: Conflict of interest: None declared., (Copyright © 2023 American College of Occupational and Environmental Medicine.)
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- 2023
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39. Trends and Non-Clinical Predictors of Respiratory Syncytial Virus (RSV) and Influenza Diagnosis in an Urban Pediatric Population.
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Feiler MO, Yucel R, Liu Z, Caserta M, Lawrence BP, Pason CH, Hardy DJ, Thevenet-Morrison K, Dozier A, and Jusko TA
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Objective: To evaluate the demographic, maternal, and community-level predictors of pediatric respiratory syncytial virus (RSV) and influenza diagnosis among an urban population of children residing in Rochester, NY., Study Design: A test-negative case-control design was used to investigate various non-clinical determinants of RSV and influenza diagnosis among 1,808 children aged 0-14 years who presented to the University of Rochester Medical Center (URMC) or an affiliated health clinic in Rochester, NY between 2012-2019. These children were all tested for RSV and influenza via polymerase-chain-reaction (PCR) method, including RSV and influenza diagnosis of all severity types. Test results were linked to medical records, birth certificates, questionnaires administered through the Statewide Perinatal Data System, and the US census by census tracts to obtain information on child, maternal, demographic, and socio-economic characteristics., Results: Overall the strongest predictor of RSV and influenza diagnosis was child's age, with every year increase in child's age, risk for RSV decreased (OR: 0.75; 95% CI: 0.71, 0.79) and risk for influenza increased (OR: 1.20; 95%: 1.16, 1.24). In addition to age, non-private insurance type was positively associated with influenza diagnosis. When considering the proportion of positive cases for RSV and influenza over all PCR tests by respiratory season, a spike in influenza cases was observed in 2018-2019., Conclusions: Age was a strong predictor of RSV and influenza diagnosis among this urban sample of children., Competing Interests: Conflicts of Interest Authors have no conflicts of interest to declare.
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- 2023
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40. Re-validation and cultural adaptation of the brief, standardized assessment tool for measuring HIV-related stigma in healthcare settings in Almaty, Kazakhstan.
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Iskakova B, Nugmanova Z, Murat Yucel R, Gamarel KE, and King EJ
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- Humans, Kazakhstan, Social Stigma, Delivery of Health Care, Health Facilities, Surveys and Questionnaires, HIV Infections epidemiology
- Abstract
The HIV epidemic continues to grow in Kazakhstan and HIV stigma remains a major barrier to HIV prevention and treatment in the country. HIV stigma in healthcare setting may also discourage people living with HIV (PLHIV) from getting the care needed. Therefore, studying the attitudes of healthcare workers towards PLHIV is important and requires well-constructed measurement tools adapted to the specific cultural context. In our study, we aimed to adapt and re-validate a brief questionnaire on HIV stigma among healthcare workers in Almaty, Kazakhstan. We held focus group discussions to obtain input on an existing questionnaire and surveyed 448 primary healthcare providers to psychometrically evaluate the scale. The final HIV-stigma scale consisted of 15 items, 6 of them measuring negative opinions about PLHIV and the rest assessing stigmatizing health facility policies towards PLHIV. Both HIV-stigma subscales demons6trated adequate psychometric properties (with Cronbach's alpha α = 0.57 for the first and α = 0.86 for the second subscale, and with factor loadings >0.35 within each subscale). High numbers of respondents holding negative attitudes towards PLHIV, detected in this sample (87%; n = 380), may suggest the need for immediate actions addressing HIV stigma in healthcare in Kazakhstan., Competing Interests: The authors have declared that no competing interests exist.
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- 2022
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41. Outcomes of prednisone-tapering regimens for cardiac sarcoidosis: A retrospective analysis demonstrating a benefit of infliximab.
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Judson MA, Adelstein E, Fish KM, Feustel PJ, Yucel R, Preston S, Vancavage R, Chopra A, and Steckman DA
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- Humans, Prednisone therapeutic use, Infliximab therapeutic use, Retrospective Studies, Glucocorticoids therapeutic use, Methotrexate therapeutic use, Sarcoidosis drug therapy, Sarcoidosis chemically induced
- Abstract
Background: The optimal treatment strategy for cardiac sarcoidosis has not been standardized. We examined the effectiveness of three prednisone-tapering treatment regimens for cardiac sarcoidosis., Methods: We retrospectively reviewed prednisone-tapering treatment regimens for cardiac sarcoidosis that contained prednisone alone (P), prednisone plus methotrexate (P-M), and prednisone plus infliximab containing regimens (P-I). We defined the success of each regimen as the ability to lower the daily prednisone dose to 7.5 mg or less for 6 or more months without developing an adverse cardiac event. We also examined the lowest effective daily prednisone dose achieved without developing an adverse cardiac event., Results: We identified 61 treatment regimens in 33 cardiac sarcoidosis patients that were analyzed. The success rate of prednisone-tapering regimens was significantly different P: 8/30, 27%; P-M: 3/23, 13%; P-I: 6/8, 75%., p = 0.04. The lowest effective daily prednisone dose for the regimens was also significantly different: P: 14.1 ± 10.1 mg; P-M: 16.9 ± 9.4 mg; infliximab: 7.8 ± 4.9 mg, (p = 0.03); by both measures the success was greatest with the P-I regimen., Conclusions: For the treatment of cardiac sarcoidosis, prednisone-tapering regimens containing infliximab are superior to those containing prednisone alone or prednisone plus methotrexate in terms of reaching 7.5 mg/day of prednisone for more than 6 months and achieving the lowest effective prednisone., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:Marc A. Judson reports a relationship with Mallinckrodt LLC that includes: funding grants. Marc A. Judson reports a relationship with aTyr Pharma that includes: funding grants. Marc A. Judson reports a relationship with Star Therapeutics, Inc. that includes: funding grants. Marc A. Judson reports a relationship with Kinevant that includes: funding grants., (Copyright © 2022 Elsevier Ltd. All rights reserved.)
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- 2022
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42. Mental Health of Emergency Department Healthcare Workers During COVID-19 in Brooklyn, New York.
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Gustafson DR, Yucel R, Apple SJ, Cirrone G, Gao H, Huang AJ, Ma X, Saad A, Wilson J, Kabariti S, and Motov S
- Abstract
Background: Maintaining good mental health among Emergency Department healthcare workers (ED HCW) is paramount to well-functioning healthcare. We measured mental health and COVID-19 symptoms in ED HCW at a COVID-19 epicenter., Methods: A cross-sectional, convenience sample of adult (≥18 years) ED HCW in Brooklyn, New York, USA, who were employed at ≥50% of a full-time effort, was surveyed September-December, 2020 with reference period March-May 2020. An anonymous email-distributed survey assessed gender, age, race, healthcare worker status (clinical versus non-clinical), SARS-CoV-2 testing, number of people to talk to, COVID-19-related home problems, mental health care interruption during COVID-19, loneliness, and survey date. Outcomes included symptoms of depression, psychological distress, perceived stress, post-traumatic stress disorder (PTSD), anxiety, and resilience measured using validated scales., Results: Of 774 HCW, 247 (31.9%) responded (mean age 38.2±10.8 years; 59.4% White; 52.5% men; 80.1% clinical; 61.6% SARS-CoV-2 tested). Average mental health scores were significantly higher among clinical vs non-clinical HCW (P's<0.0001-0.019). The proportion reporting a clinically-relevant psychological distress symptom burden was higher among clinical vs non-clinical HCW (35.8% vs 13.8%, p=0.019); and suggested for depression (53.9% clinical vs 35.7% non-clinical, p=0.072); perceived stress (63.6% clinical vs 44.8% non-clinical, p=0.053); and PTSD (18.2% clinical vs 3.6% non-clinical, p=0.064). Compared to non-clinical staff, Medical Doctors and Doctors of Osteopathy reported 4.8-fold higher multivariable-adjusted odds of clinically-relevant perceived stress (95%CI 1.8-12.9, p=0.002); Emergency Medical Technicians reported 15.5-fold higher multivariable-adjusted odds of clinically-relevant PTSD (95%CI 1.6-150.4, p=0.018). Increasing age, number of COVID-19-related home problems and people to talk to, loneliness and mental health care interruption were adversely associated with mental health; being male and SARS-CoV-2 testing were beneficial., Conclusions: COVID-19-related mental health burden was high among ED HCW in Brooklyn. Mental health support services are essential for ED HCW., Competing Interests: Declaration of Competing Interest None of the authors have any conflicts of interest related to this study.
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- 2022
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43. The association of baseline sarcoidosis measurements with 6-month outcomes that are of interest to patients: Results from the On-line Sarcoidosis Assessment Platform Study (OSAP).
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Judson MA, Yucel R, Preston S, Chen ES, Culver DA, Hamzeh N, Lower EE, Sweiss NJ, Valeyre D, Veltkamp M, Victorson DE, Beaumont JL, Singh N, Shivas T, Vancavage R, and Baughman RP
- Subjects
- Health Status, Humans, Spirometry, Walking, Quality of Life, Sarcoidosis complications
- Abstract
Introduction: The impact of common measures to assess sarcoidosis have not been compared longitudinally to outcomes that are meaningful to patients. We prospectively examined the relationship of baseline measurements of sarcoidosis status to outcomes of interest to patients longitudinally over 6 months., Methods: Sarcoidosis patients cared for at 6 US medical centers were "phenotyped" at baseline with measurements of pulmonary function, organ involvement, health related quality of life (HRQoL) instruments, and their anti-sarcoidosis treatment history. These patients were followed for 6 months by monitoring outcomes of interest to patients (OIPs) including steps walked, calories expended, sleep, HRQoL measures, workdays missed and health care utilization. For each baseline phenotypic measurement, patients were dichotomized into two groups above and below a specified cutoff value. The area under the OIP versus time curve was compared between these two groups., Results: The cutoff values for many baseline phenotypic measures distinguished the patients into groups with significantly different 6-month OIPs. The chosen cutoff for the patient global estimate of health status distinguished the most OIPs (13/15). The 6-min walk distance cutoff was associated with more OIPs than spirometric measures. All of the HRQOL measure cutoffs were associated with many OIPs, although most of them were other HRQOL measures., Interpretation: Cutoffs for most of the phenotypic measures used to assess sarcoidosis distinguished groups of sarcoidosis patients with differing OIPs over the subsequent 6 months. The patients' global assessment of their disease was the most accurate of these measures., Clinical Trial Registration Number: NCT04342403., (Copyright © 2022. Published by Elsevier Ltd.)
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- 2022
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44. Metabolic Risk and Depression among Elderly Mexican Americans: The Roles of Nativity Status.
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Zhang W, Vásquez E, Botoseneanu A, and Yucel R
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- Adult, Aged, Aged, 80 and over, Hispanic or Latino, Humans, Longitudinal Studies, Young Adult, Depression epidemiology, Mexican Americans
- Abstract
Objective: To evaluate the relationship between metabolic risk (MR) and depression in a sample of older Mexican Americans and examine whether the association differs by age at migration., Methods: Longitudinal study using data from the Hispanic Established Populations for the Epidemiologic Study of the Elderly (HEPESE) (N=807, mean age = 84.3). The analytical sample was compiled from wave 6 (2007) to wave 7 (2010-2011) of HEPESE. Random-effect logistic regression examined the association between MR and depression and tested the model stratified by nativity status and age at migration., Results: MR was associated with higher odds of depression for US-born Mexican Americans after controlling for potential confounders. Similarly, among Mexican Americans who migrated before age 20, MR was associated with higher odds of depression., Conclusion: The findings highlight the importance of age at migration when evaluating the health of foreign-born Mexican Americans from a life-course perspective. Particularly among Mexican Americans who migrated before age 20, those with MR were more vulnerable to depression than their counterparts without MR., Competing Interests: Competing Interests: None declared., (Copyright © 2021, Ethnicity & Disease, Inc.)
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- 2021
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45. Hispanic Disaster Preparedness in the United States, 2017: Examining the Association with Residential Characteristics.
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Friedman S, Fussell E, Nakatsuka M, and Yucel R
- Abstract
The number of highly destructive disasters is increasing in regions of the United States where the Hispanic population is growing fastest. Up-to-date studies of disaster preparedness are needed that include housing measures and other factors that may account for differences in disaster preparedness between Hispanics and other racial and ethnic groups. This study fills this gap in the literature by using data from the 2017 American Housing Survey, which includes a topical module on disaster planning along with the core measures of housing and neighborhood characteristics, including housing tenure. The results reveal that Hispanics are generally less prepared than non-Hispanic Whites regarding resource- and action-based measures, with a few exceptions. Hispanics, Blacks, and Asians are significantly more likely than Whites to have at least 3 gallons of water per person, and Hispanics and Blacks are significantly more likely than Whites and Asians to have flood insurance. The findings show that housing and residential characteristics are consistently significant in predicting preparedness-controlling for other relevant variables-although they do not attenuate the disadvantages that Hispanics and Blacks face in their disaster preparedness relative to Whites. Future research would benefit from further exploration of the linkage between racial and ethnic inequalities in housing and neighborhood characteristics and household disaster preparedness.
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- 2021
46. Response.
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Shkolnik B, Judson MA, Austin A, Hu K, D'souza M, Zumbrunn A, Huggins JT, Yucel R, and Chopra A
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- Humans, Ultrasonography, Pleural Effusion
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- 2020
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47. Diagnostic Accuracy of Thoracic Ultrasonography to Differentiate Transudative From Exudative Pleural Effusion.
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Shkolnik B, Judson MA, Austin A, Hu K, D'Souza M, Zumbrunn A, Huggins JT, Yucel R, and Chopra A
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- Adult, Aged, Aged, 80 and over, Diagnosis, Differential, Female, Humans, Male, Middle Aged, Thoracentesis, Ultrasonography, Interventional, Exudates and Transudates diagnostic imaging, Pleural Effusion diagnostic imaging, Ultrasonography methods
- Abstract
Background: There are limited data examining the diagnostic accuracy of thoracic ultrasonography (TUS) in distinguishing transudative from exudative pleural effusions., Research Question: What is the diagnostic accuracy of TUS in distinguishing transudative from exudative effusions in consecutive patients with pleural effusion?, Study Design and Methods: Consecutive patients who underwent TUS and subsequently a diagnostic thoracentesis with a pleural fluid analysis were identified. TUS images of the pleural effusions were interpreted by previously published criteria. We evaluated the diagnostic performance of TUS findings in predicting a transudative vs exudative pleural effusions and specific pleural diagnoses., Results: We evaluated 300 consecutive pleural effusions in 285 patients. The pleural effusions were classified as exudative in 229 of 300 cases (76%). TUS showed anechoic effusions in 122 of 300 cases (40%) and complex effusions in 178 of 300 cases (60%). An anechoic appearance on TUS was associated with exudative effusions (68/122; 56%) as compared with transudative effusions (54/122; 44%). The presence of a complex-appearing effusion on TUS was highly predictive of an exudative effusion (positive predictive value of 90%). However, none of the four TUS characteristics were highly specific of a pleural diagnosis., Interpretation: Thoracic ultrasonography is inadequate to diagnose a transudative pleural effusion reliably. Although the TUS findings of a complex effusion may suggest an exudative pleural effusion, specific pleural diagnoses cannot be predicted confidently., (Copyright © 2020 American College of Chest Physicians. Published by Elsevier Inc. All rights reserved.)
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- 2020
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48. Antifungal Activity of Antimicrobial Peptides and Proteins against Aspergillus fumigatus .
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Ballard E, Yucel R, Melchers WJG, Brown AJP, Verweij PE, and Warris A
- Abstract
Antimicrobial peptides and proteins (AMPs) provide an important line of defence against invading microorganisms. However, the activity of AMPs against the human fungal pathogen Aspergillus fumigatus remains poorly understood. Therefore, the aim of this study was to characterise the anti- Aspergillus activity of specific human AMPs, and to determine whether A. fumigatus can possess resistance to specific AMPs, as a result of in-host adaptation. AMPs were tested against a wide range of clinical isolates of various origins (including cystic fibrosis patients, as well as patients with chronic and acute aspergillosis). We also tested a series of isogenic A. fumigatus isolates obtained from a single patient over a period of 2 years. A range of environmental isolates, obtained from soil in Scotland, was also included. Firstly, the activity of specific peptides was assessed against hyphae using a measure of fungal metabolic activity. Secondly, the activity of specific peptides was assessed against germinating conidia, using imaging flow cytometry as a measure of hyphal growth. We showed that lysozyme and histones inhibited hyphal metabolic activity in all the A. fumigatus isolates tested in a dose-dependent fashion. In addition, imaging flow cytometry revealed that histones, β-defensin-1 and lactoferrin inhibited the germination of A. fumigatus conidia.
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- 2020
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49. Trends in height, weight, BMI, skinfolds, and measures of overweight and obesity from 1979 through 1999 among American Indian Youth: The Akwesasne Mohawk.
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Schell LM, Gallo MV, Pfeiffer S, Lee F, Garry D, and Yucel R
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- Adolescent, Body Weights and Measures, Canada, Child, Female, Humans, Male, New York, Overweight epidemiology, Body Weight physiology, Indians, North American statistics & numerical data, Pediatric Obesity epidemiology
- Abstract
Background/objectives: Information on recent changes in overweight, obesity, and adiposity among American Indians is scarce. To assess changes in size and adiposity among American Indian youth, data from two samples of Akwesasne Mohawk youth, were compared., Subjects/methods: Both project 1, conducted in 1979 (n = 75) and Project 2, conducted between 1996 and 1999 (n = 206), sampled youth 10-14 years of age from the Akwesasne Mohawk Reservation (aka St. Regis) that borders New York state, and Ontario and Quebec provinces. Heights, weights, and skinfold thicknesses were converted to z-scores using CDC reference values. BMI status was calculated in terms of WHO age-specific cutoffs and CDC cutoffs., Results: z-Scores for heights differed little between projects. The between-project difference in weight z-score is twice the between-project z-score difference for height. Differences among males are larger and more often significant. Triceps and subscapular skinfold thickness are significantly greater in Project 2. The rate of overweight and obesity combined, increased 3.3-fold. In multiple regression analyses with sex, height, and age in the model, project is a significant predictor of weight and skinfolds., Conclusions: Weight and adiposity have increased substantially from 1979 to 1996-99. Overweight and obesity became significantly more common. Given the increase in adiposity, these youth may be facing significant health risks as adults in terms of cardiovascular disease, cancer, and type II diabetes unless weight and adiposity is reduced.
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- 2020
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50. A longitudinal study of polychlorinated biphenyls and neuropsychological function among older adults from New York State.
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Tanner EM, Bloom MS, Kannan K, Lynch J, Wang W, Yucel R, and Fitzgerald EF
- Subjects
- Aged, Animals, Diet statistics & numerical data, Female, Fishes, Food Contamination, Humans, Male, Middle Aged, New York, Seafood, Environmental Exposure statistics & numerical data, Environmental Pollutants blood, Neuropsychological Tests, Polychlorinated Biphenyls blood
- Abstract
Background: Cross-sectional studies have linked greater polychlorinated biphenyl (PCB) exposure to adverse neuropsychological effects in older adults, including learning, memory, and depressive symptoms. However, no studies among older adults have evaluated the association over time., Objectives: To assess the effect of serum PCB levels on neuropsychological function over a 14-year period in a cohort of older men and women from a PCB-contaminated area of New York State., Methods: In 2000-2002, we assessed serum PCB levels and neuropsychological function (including the California Verbal Learning Test Trial 1 (CVLTT1) for verbal memory and learning, and the Beck Depression Index (BDI) for depressive symptoms) in 253 men and women, ages 55-74 years. A total of 116 (46%) persons repeated the PCB and neuropsychological assessment 14 years later. To assess the association over time, we used generalized estimating equations with clustering variables time, total PCB (∑PCB), and ∑PCB × time, and adjusted for baseline age, sex, smoking, and total serum-lipids. For statistically significant ∑PCB × time interactions, we evaluated the association between PCBs and either verbal memory and learning or depressive symptoms while holding ∑PCB constant at the 10th and 90th percentiles to clarify the direction of the interaction., Results: Over the study period, serum ∑PCB levels (wet-weight) declined by 22%, and were associated with different patterns of change over time for memory (∑PCB × Time β = 0.08 p = 0.009) and depressive symptoms (∑PCB × Time β = -0.16 p = 0.013). Specifically, verbal memory and learning decreased (β = -0.08 p = 0.008) and depressive symptoms increased (β = 0.17 p = 0.008) among persons with low exposure (∑PCB levels at the 10th percentile), while persons with high exposure (90th percentile) showed non-significant improvements., Discussion: In this cohort, declining ∑PCB levels were likely due at least in part to low rates of local fish consumption in recent decades, given the ban since 1976. The decreased verbal memory and learning and increased depressive symptoms over time among persons with low serum ∑PCB levels is consistent with studies of normative aging. However, the small improvements in those outcomes among those with high serum ∑PCB levels was unexpected. Healthy survivor selection bias or uncontrolled confounding may explain this result. It may also indicate that the neurotoxic impacts of PCBs in older adults are not permanent, but future studies are needed to confirm this possibility., (Copyright © 2019 Elsevier GmbH. All rights reserved.)
- Published
- 2020
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