ArticleAnnals of epidemiology2015
Comparison of web versus interview participants in a case-control study.
Article in Annals of epidemiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
1 citing paper in PubMed.
- PONSETI METHOD IN BRAZIL: FIRST TEN YEARS OF A CLUBFOOT WEBSITE - USERS PROFILE.Acta ortopedica brasileiraArticle
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Authors and funding
2 authors.
Funding
Abstract
purposeTo evaluate whether selection bias might be introduced because of differential self-selection into an internet-based case-control study.
methodsWe compared sociodemographic factors and behavioral factors for cases and controls who opted for their first entrée into the study be via the internet (Web group) versus the telephone (Phone group), using data from a study on clubfoot.
resultsOverall, 200 of 1,825 mothers were in the Web group and were more likely to be non-Hispanic White, nonsmokers, more educated, wealthier, and took ≥7 medications/vitamins in pregnancy. These differences were greater for case mothers, introducing the potential for selection bias. Maternal smoking is an established risk factor for clubfoot and was confirmed in the Phone group (OR = 1.61) but was not observed in the Web group (OR = 1.15).
conclusionOur results suggest there is potential for selection bias if enrollment is solely internet based for a case-control study.
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