A methodological note on the selection of friends as controls.
A number of issues inherent in the selection of friends as controls in case-control studies are illustrated in the light of a recent dietary study, based on hospital and friend controls. Preselection of certain characteristics of the controls by the interviewee is almost unavoidable. The choice of controls to be used in a case-control study must reflect the nature and type of hypothesis which is being tested. Advantages and drawbacks of potential control groups must be weighted against each other.
Department of Clinical Epidemiology, Chaim Sheba Medical Center, and the Stanley Steyer Institute for Cancer Epidemiology and Research, Tel Aviv University, Tel Hashomer, Israel.
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S
Kaplan
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Novikov
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Modan
D000328:Adult; D001932:Brain Neoplasms / Q000209:etiology; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D007557:Israel; D008297:Male; D008875:Middle Aged; D009603:Nitroso Compounds / Q000009:adverse effects
D009603:Nitroso Compounds