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Theory and methods
National health surveys by mail or home interview: effects on response
  1. H S J Picavet
  1. National Institute of Public Health and the Environment, the Netherlands
  1. Dr Picavet, Centre for Chronic Diseases Epidemiology (CZE, pb 101), National Institute of Public Health and the Environment, PO box 1, 3720 BA Bilthoven, the Netherlands (susan.picavet{at}rivm.nl)

Abstract

STUDY OBJECTIVE To study the effect of using a mail questionnaire or home interviews on the size and the selectivity of response to national health surveys.

DESIGN The interview survey and the mail survey were both carried out in the same country (the Netherlands) using the same sample frame, the same study period (1998) and collected partly the same data on demographic, socioeconomic and health characteristics.

SETTING The Netherlands.

PARTICIPANTS Dutch non-institutionalised inhabitants aged 25 years and over.

MAIN RESULTS Response to the mail survey was lower (46.9%, n=3664) than to the interview survey (58.5%, n=6061). The mail survey gave higher response rates for women and lower response rates for persons with lower levels of education. Respondents to the mail survey reported lower rates of smoking but a slightly worse health status and higher figures on the use of health care services. No differences by method of data collection were found for age, marital status, region, household composition, work status and categories of body mass index.

CONCLUSION Although the response of the mail survey was lower than the home interview survey, respondents showed generally small differences, with exception of level of education.

  • mail surveys
  • interview surveys
  • non-response

https://doi.org/10.1136/jech.55.6.408

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    Footnotes

    • Funding: the Dutch population-based Musculoskeletal Complaints & Consequences Cohort (DMC3-study) was financially supported by the Ministry of Health, Welfare and Sport of The Netherlands and the National Institute of Public Health and the Environment and carried out in collaboration with Statistics Netherlands.

    • Conflicts of interest: none.