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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.

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Showing 1 to 20 of 34 for “"effect modification"”.

  1. Exploring the Relationship Between Sunscreen Use and Screen Time in American High School Students

    Gorbman, Celia R2024

    … controlling for sex, age, and race/ethnicity. Effect modification by sex was assessed, considering potential differences in non-school screen time behaviors between boys and girls. Results: In both adjusted and unadjusted models, we found that the prevalence of poor sunscreen use among students …

    washington Repository record

  2. Markers of Circadian Disruption and Reproductive Risk Factors for Breast Cancer

    Stock, David2015

    … regression and generalized estimating equations. Effect modification of nocturnal melatonin and prolactin by age and diurnal preference was additionally investigated. Results: The hazard of natural menopause was observed to be lower in women who had worked >10 years of rotating shifts since …

    toronto-retro Repository record

  3. Modification of a vortex-panel method to include surface effects and allow finite-element interface

    Simmons, Scott R.Virginia Tech1994

    … flow is used as a basis for modeling surface effects and creating a finite-element interface so that an arbitrary body can be analyzed. The basic model consists of triangular panels of linearly varying vorticity which represent the body, vortex cores on the lifting edges of the body, and …

    vt Repository record

  4. Comorbidity of disordered eating and depression: Examining intersectional inequities and cardiometabolic health consequences across the life course

    McGuire, Franklin Hunter2024

    … gender identity, and weight status, effect modification of these longitudinal associations was assessed. Overall, this dissertation highlights the importance of considering the role of interlocking systems of oppression when conducting both descriptive and analytical epidemiologic …

    wustl Repository record

  5. Causal Inference Beyond Estimating Average Treatment Effects

    Lee, Kwonsang2017

    … that is often called the average treatment effect (ATE), and rely on identifying assumptions to allow causal interpretation. However, more specific treatment effects beyond the ATE can be estimated under the same assumptions. For example, instead of estimating the mean of potential outcomes …

    penn Repository record

  6. A decade of change: unraveling the factors shaping untreated dental caries trends in U.S. children, 2011-2020

    Alhudaithy, Lina Hassan R2025

    … Interaction terms evaluated time-based effect modification, and stratified analyses were conducted by age group. Survey weights were applied to account for NHANES complex design. RESULTS: Overall, 13.7% of children had untreated caries. Prevalence declined from 15.4%(2011–2012) to …

    bu Repository record

  7. The impact of job insecurity on mental health over time across gender and family responsibility

    Kaur, SukhdeepBrock University2021

    … examining their contribution as potential effect modifiers may provide insights into gender inequalities in mental health and inform gender-sensitive labour policies to ameliorate the negative effects of job insecurity. Our study addresses this gap by examining the longitudinal association …

    brock Repository record

  8. Modification by sex and atopy of the effect of chemical air pollutions and biological air pollutants including pollen and fungal spores on children respiratory health in the Western Cape, Cape South Africa

    Mahmoud, Hussein YasmeenDepartment of Public Health and Family Medicine2024

    … grass pollen. Furthermore, there was evidence of effect modification by sex and atopy since associations were much stronger among boys and atopic children. Annual NO2 levels were positively associated with FeNO>35ppb among boys (OR:2.77, 95% CI: 1.02-7.47) but not girls. A strong positive …

    cape-town Repository record

  9. Effect of Low vs High Eating Frequency on Perceived Appetite, Plasma Appetite Hormones, and Appetite Relationships: A Component of the Frequency of Eating and Satiety Hormones (FRESH) Study

    Hill, Jerry Lee2022

    … to determine whether physical activity had an effect modification on the data. Results Eating frequency had no effect on plasma ghrelin and leptin levels and had no effect on any of the self-reported measures of appetite (p>0.05 for all). High eating frequency led to significantly lower (9.7%) …

    washington Repository record

  10. A Tale of Two Parenting Interventions: Programme Effects on Sensitive and Responsive Caregiving in Brazil and the United Kingdom

    Healy, MorganUniversity of Cambridge2024

    … drive child outcomes, *for whom* they are most effective, and *whether longitudinal* effects can be sustained *real-world contexts*, continue to persist. This thesis contributes empirical evidence on the topic by evaluating the effectiveness of two large-scale, standard-care parenting …

    cambridge Repository record

  11. From Education to Tumour Characteristics in Colorectal Cancer: An Analysis of the Pathways.

    Airia, Parisa2014

    … Cancer Registry. Pathways were evaluated for effect modification by sex and two indicators of CRC genetic susceptibility (Bethesda criteria and newly identified familial cancer clusters). Results: Four food patterns (healthy foods, high-fat foods, sweet and processed foods, and oriental foods) …

    toronto-retro Repository record

  12. The Relationship Between Heat Illness and Pre-existing Medical Conditions During Summer

    김, 시헌2016

    … risk, RR)로 추정하였다. 기저질환 유무에 따른 연관성의 차이는 효과변경(effect modification)으로 확인하였다. 효과변경은 기저질환을 가지고 있는 집단에서의 상대위험도와 그렇지 않은 집단에서의 상대위험도의 비로 계산하였다. 기저질환과 열사병 사이에 연관성이 있는지 조사하기 위하여 2012년도 온열질환 감시체계 자료를 이용하여 사례-대조군 연구를 시행하였다. 사례군은 열사병으로 진단받은 환자로 정의하였고, 대조군은 온열질환 환자 중 열탈진, 열부종, 열경련, 열실신으로 진단된 환자로 정하였다. 열사병과 …

    ajou Repository record

  13. Effects of Exposure to Environmental Pollutants on Markers of Adiposity and Inflammation

    Konstantina Tsintsifas (22483015)2025

    … positively associated with change in BMI and WC. Effect modification analyses further indicated that associations between specific OCPs and adiposity were present only among postmenopausal women. We also examined associations between POPs and inflammatory markers, including high-sensitivity …

    uic

  14. Semiparametric Varying Coefficient Models for Matched Case-Crossover Studies

    Ortega Villa, Ana MariaVirginia Tech2015

    … controls are matched cannot exert a confounding effect on independent predictors included in the conditional logistic regression model. Any stratum effect is removed by the conditioning on the fixed number of sets of the case and controls in the stratum. However, some matching covariates such as …

    vt Repository record

  15. Methodological considerations related to the epidemiologic study of birth outcomes: maternal ART use and adverse birth outcomes

    Malaba, Thokozile RosemaryDepartment of Public Health and Family Medicine2023

    … PTD risk. There did not appear to be any effect modification in the trajectory groups by HIV status for PTD. In the cohort study the overall incidence of SGA infants was 9%, with an increased SGA risk observed in women living with HIV compared to living without HIV. While no differences …

    cape-town Repository record

  16. Hormonal factors and insulin-like growth factor-1 in North American postmenopausal women

    Chan, Carmen2016

    Background: Mechanisms underlying the effect of estrogen exposure on breast cancer risk remain unclear. Insulin-like growth factor-1 (IGF-1) levels have been positively associated with breast cancer and are a potential mechanism. Objectives: The objectives of this thesis are: 1) to explore whether …

    queens Repository record

  17. Receipt of Cardiac Care Following Hospitalization for an Acute Myocardial Infarction for Individuals With a History of Depression or Schizophrenia

    Morkem, Rachael2012

    … with a small but significant prior drug use effect modification. Interpretation: Persons with depression or schizophrenia with no CVD history are just as likely to receive most recommended cardiac care interventions compared to those without a mental disorder. The source of the differences in …

    queens Repository record

  18. Unmasking risk variability in a changing climate: acute effects from exposure to outdoor heat and air pollution among patients with end-stage renal disease

    Remigio, Richard V2021

    … exposures. However, little is known about the effect of extreme heat events (EHE), air pollution, and ambient temperature on this targeted population. This dissertation focused on ESRD patients receiving hemodialysis treatments at Fresenius Medical Care facilities within the Northeastern United …

    maryland Repository record

  19. Physical, Behavioral, Psychological, And Metabolomic Predictors Of Weight And Adiposity Change In Young Adults

    Hootman, KatieCornell University2015

    … population subgroup differences, could lead to effective prevention strategies. Methods: In the context of a prospective study design of college freshmen with repeated measures of anthropometry and adiposity (measured via dual energy x-ray absorptiometry), over one academic year, we evaluated …

    cornell Repository record

  20. The relation between sex, age and vascular function in the Framingham Heart Study

    Leleiko, Rebecca MayaBoston University2014

    … Third Generation cohorts. We found evidence of effect modification by sex on the relation of age and flow-mediated dilation (P=0.0001) and the relation of age and hyperemic flow velocity (P<0.0001). Using restricted cubic spine analysis, we observed that the relation of age and flow-mediated …

    bu Repository record

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