[Experimentation on a mail questionnaire for a case-control study].
A mail questionnaire, collecting information mainly on occupational history, was sent to 50 subjects who had been interviewed at home with a longer questionnaire three years before, and to 26 subjects who refused at that time to be interviewed. The 50 subjects were sampled among controls enrolled in a population based case-control study on soft tissue sarcomas; the 26 were all non-respondent controls in the same study. The questionnaire was returned by 83% and 14% respectively. A comparison between home and mail interviews suggests that the quality of information is strictly comparable for 78% of the items. For discordant items, about 50% showed a better quality of information from home interviews; in the other 50% a better information was provided by the mail interview.
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D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D003625:Data Collection / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011177:Postal Service; D011795:Surveys and Questionnaires
Sperimentazione di un questionario postale per uno studio caso-controllo.