Social psychiatry

, Volume 13, Issue 4, pp 231–237 | Cite as

The use of a two-phase design in a prevalence survey

  • P. Duncan-Jones
  • Scott Henderson
Other Papers


A method is described for the use of a two-phase design in a prevalence survey of non-psychotic psychiatric morbidity. The method consists of screening a population sample, then giving a standardised psychiatric interview to varying proportions of those screened, stratified according to the probability of each respondent's being a case. Prevalence rates can then be calculated by weighting back to the original population. By harnessing together two well-proven instruments, the General Health Questionnaire and the Present State Examination, one can obtain a rigorous and internationally comparable description of morbidity while at the same time efficiently deploying scientific staff in the field.


Public Health Prevalence Rate General Health Population Sample Harness 
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Copyright information

© Springer-Verlag 1978

Authors and Affiliations

  • P. Duncan-Jones
    • 1
  • Scott Henderson
    • 1
  1. 1.NH & MRC Social Psychiatry Research UnitAustralian National UniversityCanberraAustralia

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