Endgames Statistical Question

Questionnaire surveys

BMJ 2011; 343 doi: http://dx.doi.org/10.1136/bmj.d4449 (Published 20 July 2011) Cite this as: BMJ 2011;343:d4449
  1. Philip Sedgwick, senior lecturer in medical statistics
  1. 1Section of Medical and Healthcare Education, St George’s, University of London, Tooting, London, UK
  1. p.sedgwick{at}sgul.ac.uk

Researchers developed a questionnaire to ascertain doctors’ perceptions about their own and their colleagues’ use of alcohol while on call. A 20% random sample of all doctors, stratified by specialty, in one county of the United States was selected. A total of 206 questionnaires were mailed and 135 (65%) responses were received. Those who responded to the survey differed from those who did not. Non-responders were more likely to be women (25% v 16%), to have graduated from medical school more recently (18 years v 20 years), to be doctors of internal medicine (31% v 17%), but they were less likely to be surgeons or …

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