Results 11 to 20 of about 39,437,158 (299)
Differential Misclassification of Exposure in Case-Crossover Studies
Epidemiology, 2004 The aim of this study is to examine 2 types of differential misclassification of exposure in case-crossover studies. The first is the outcome-dependent misclassification of exposure, meaning that if an event has occurred, it could affect the reporting of exposure.
Jette, Möller +2 more
openaire +3 more sources
Hierarchical Crossover in Genetic Algorithms [PDF]
, 1996 This paper identifies the limitations of conventional crossover in genetic algorithms when operating on two chromosomes of differing lengths. To address these problems, the concept of a Semantic Hierarchy (i.e.
Wakefield, Jonathan P. +1 more
core +4 more sources
Extraction bradycardia: a pilot case-crossover study [PDF]
Head & Face Medicine, 2013 Abstract Purpose Significant vasovagal reaction is one of the untoward events in the course of simple extractions. The present study then aimed to record the patients’ heart rate during the extraction procedure. Materials and methods Informed consents were obtained in ...
Rashad, Ashkan +3 more
openaire +2 more sources
Selecting appropriate study designs to address specific research questions in occupational epidemiology. [PDF]
, 2007 UNLABELLED: Various epidemiological study designs are available to investigate illness and injury risks related to workplace exposures. The choice of study design to address a particular research question will be guided by the nature of the health ...
Pearce, Neil +2 more
core +1 more source
Case-crossover design in air pollution epidemiology
, 2003 The case-crossover design was developed to study the effects of transient, short-term exposures on the risk of acute events, such as myocardial infarction, in the early 1990s. This paper illustrates how the principles of case-crossover design are related
Jaakkola, Jouni
core +4 more sources
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
Respiratory Research, 2021 Background Positive associations between ambient PM2.5 and cardiorespiratory disease have been well demonstrated during the past decade. However, few studies have examined the adverse effects of PM2.5 based on an entire population of a megalopolis.
Zhan Ren +9 more
doaj +1 more source
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
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 +2 more sources
Case-crossover and case time-control design (inspired by Hernández-Díaz and colleagues [33]).
, 2021 Case-crossover and case time-control design (inspired by Hernández-Díaz and colleagues [33]).
Oleguer Plana-Ripoll (488439) +6 more
core +1 more source