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.
Kaplan
S
S
Department of Clinical Epidemiology, Chaim Sheba Medical Center, and the Stanley Steyer Institute for Cancer Epidemiology and Research, Tel Aviv University, Tel Hashomer, Israel.
Novikov
I
I
Modan
B
B
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