Abstract
Part IV presents guidelines for a questionnaire to be used in case-control studies. Such a questionnaire would record information on possible exposure, confounders, and effect modifiers from both the cases and the controls. The questionnaire does not mention the disease status of the respondent. This is done to reduce bias that may result from the subject's becoming aware of the precise hypotheses of interest or from the interviewer's being aware of the disease status of the respondent. The latter situation may result in the interviewer's being more persistent in questioning cases than …
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
