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Antibiotics and oral contraceptive failure — a case-crossover study [PDF]
Contraception, 2011 Evidence on the association between antibiotic use and combined oral contraceptive (COC) failure is controversial. We examined the effect of concomitant antibiotic treatment on the risk of breakthrough pregnancy among COC users.We performed a case-crossover study of 1330 COC failure cases among 17,721 women from the Slone Epidemiology Center Birth ...
Toh, Sengwee +4 more
openaire +3 more sources
Environment International, 2022 Background: The acute effects of exposure to ambient particulate matter with an aerodynamic diameter ≤1 μm (PM1) on cardiovascular disease (CVD) mortality remain unclear.
Ruijun Xu +9 more
doaj +1 more source
Sample size estimation for case‐crossover studies
Statistics in Medicine, 2018 Case‐crossover study designs are observational studies used to assess postmarket safety of medical products (eg, vaccines or drugs). As a case‐crossover study is self‐controlled, its advantages include better control for confounding because the design controls for any time‐invariant measured and unmeasured confounding and potentially greater ...
Sai Dharmarajan +2 more
openaire +4 more sources
Persistent User Bias in Case-Crossover Studies in Pharmacoepidemiology [PDF]
American Journal of Epidemiology, 2016 Studying the effect of chronic medication exposure by means of a case-crossover design may result in an upward-biased odds ratio. In this study, our aim was to assess the occurrence of this bias and to evaluate whether it is remedied by including a control group (the case-time-control design).
Hallas, Jesper +4 more
openaire +3 more sources
TH Open, 2023 Background Surgery is a major transient risk factor for venous thromboembolism (VTE). However, the impact of major surgery as a VTE trigger has been scarcely investigated using a case-crossover design.
Dana Meknas +3 more
doaj +1 more source
Relativistic BCS-BEC crossover of a two-species Fermi gas with number density asymmetry at zero temperature [PDF]
, 2009 We systematically study relativistic two-species fermions with tunable attractive interactions and number-density asymmetry at zero temperature. In general, a Bardeen-Cooper-Schrieffer (BCS) - Bose-Einstein Condensation (BEC) - relativistic BEC (RBEC ...
Chien, Chih-Chun, Guo, Hao, He, Yan
core +1 more source
Journal of Epidemiology, 2016 Background: Epidemiology studies have shown a consistently increased risk of acute myocardial infarction (AMI) correlated with particulate matter (PM) exposure. However, little is known about the association with specific AMI subtypes. In this work, we
Qian Zhang
doaj +1 more source
Frontiers in Pharmacology, 2019 Background and Objective: It has been suggested to avoid cilostazol, the first-line therapy for peripheral arterial disease, in patients with congestive heart failure (HF). The objective of this study was to evaluate the risk of hospitalization for heart
Cho-Kai Wu +7 more
doaj +1 more source
Triggers for Preeclampsia Onset: a Case‐Crossover Study
Paediatric and Perinatal Epidemiology, 2016 AbstractBackgroundRisk factors for preeclampsia are well established, whereas, the triggers associated with timing of preeclampsia onset are not. The aim of this study was to establish whether recent infection or other triggers were associated with timing of preeclampsia onset.MethodsWe used a case‐crossover design with preeclampsia cases serving as ...
Jane B, Ford +5 more
openaire +3 more sources
Bias in case‐crossover studies of medications due to persistent use: A simulation study [PDF]
Pharmacoepidemiology and Drug Safety, 2020 AbstractPurposeThe case‐crossover design is increasingly used to evaluate the effects of chronic medications; however, as traditionally implemented in pharmacoepidemiology, with referent period preceding the outcome, it may lead to bias in the presence of persistent exposures.
Katsiaryna Bykov +5 more
openaire +2 more sources