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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
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
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
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
British medical journal, 2019 Objective To assess risks and costs of hospital admission associated with short term exposure to fine particulate matter with diameter less than 2.5 µm (PM2.5) for 214 mutually exclusive disease groups.
Yaguang Wei +8 more
semanticscholar +1 more source
Weather conditions associated with subarachnoid hemorrhage: a multicenter case-crossover study
BMC Neurology, 2021 Background Most spontaneous subarachnoid hemorrhages (SAH) occur unexpectedly and independently of classical risk factors. In the light of increasing climate variability and change, we investigated weather and rapid weather changes as possible short-term
Michael Kockler +8 more
semanticscholar +1 more source
Impact of Heat Waves on Hospitalisation and Mortality in Nursing Homes: A Case-Crossover Study
International Journal of Environmental Research and Public Health, 2021 Climate change leads to more days with extremely hot temperatures. Previous analyses of heat waves have documented a short-term rise in mortality. The results on the relationship between high temperatures and hospitalisations, especially in vulnerable ...
Ine Van den Wyngaert +7 more
semanticscholar +1 more source