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Charles University, Faculty of Medicine in Hradec Kralove, Czech Republic, EU; 4(th) Department of Internal Medicine, University Hospital Hradec Kralove, Czech Republic, EU.
Parallel accounts? Discrepancies between self-report (diary) and recall (questionnaire) measures of the same sexual behaviour.
AIDS Care
April 1999
University of Essex, Colchester, UK.
Questionnaires and diaries have complementary biases and advantages for obtaining information on sexual behaviour but self-completed sexual diaries have the advantage of reducing retrospective bias. In a validation study of homosexual behaviour, sexual diary counts and subsequent questionnaire estimates (together with ratings of the certainty of the estimates) referring to the same month are compared and the discrepancies analyzed. Main findings include: questionnaire data yield consistently higher average estimates than diary counts, but have the same ordinal profile; individual difference (diary-questionnaire) scores show that 55% of questionnaire estimates of acts are higher than diary counts, 20% are identical and 25% are under-estimates; discrepancies are differentially located in different sexual acts.
View Article and Find Full Text PDFDoes it matter whom and how you ask? inter- and intra-rater agreement in the Ontario Health Survey.
J Clin Epidemiol
February 1997
Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada.
A large amount of information in the 1990 Ontario Health Survey (OHS) was collected from proxy respondents using questions administered in face-to-face interviews. Can this type of information represent candid self-reported measures of health status? Inter-rater agreement was assessed using Cohen's kappa statistic for responses to questions that were answered both by individuals about themselves and by proxies on their behalf. Intra-rater agreement, assessing the effect of mode of survey administration (in-person interviews versus self-completed written questionnaires) on the responses, was also investigated using the kappa statistic.
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