The efficiency of two-phase designs in prevalence surveys of mental disorders

Stephen C. Newman; Patrick E. Shrout; Roger C. Bland

doi:10.1017/S0033291700013362

The efficiency of two-phase designs in prevalence surveys of mental disorders

Stephen C. Newman, Patrick E. Shrout, Roger C. Bland

Psychology

Research output: Contribution to journal › Article › peer-review

Abstract

A two-phase survey of mental disorders uses a screening test to identify possible cases, thereby reducing the resources devoted to interviewing those not having the condition of interest. It is demonstrated using a mathematical model that in situations likely to be encountered in practice a two-phase design may lead to an increase in the efficiency of prevalence rate estimation, and also to an improvement in the efficiency of case detection. However, in certain applications the modest gain in efficiency may not warrant the additional complexity of a two-phase approach to data collection. Data from a survey of mental disorders in Edmonton, Canada, which collected information on 3258 community residents using the Diagnostic Interview Schedule and the General Health Questionnaire, are used to demonstrate how two-phase methods would have changed the efficiency of an actual survey.

Original language	English (US)
Pages (from-to)	183-193
Number of pages	11
Journal	Psychological Medicine
Volume	20
Issue number	1
DOIs	https://doi.org/10.1017/S0033291700013362
State	Published - Feb 1990

ASJC Scopus subject areas

Applied Psychology
Psychiatry and Mental health

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10.1017/S0033291700013362

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title = "The efficiency of two-phase designs in prevalence surveys of mental disorders",

abstract = "A two-phase survey of mental disorders uses a screening test to identify possible cases, thereby reducing the resources devoted to interviewing those not having the condition of interest. It is demonstrated using a mathematical model that in situations likely to be encountered in practice a two-phase design may lead to an increase in the efficiency of prevalence rate estimation, and also to an improvement in the efficiency of case detection. However, in certain applications the modest gain in efficiency may not warrant the additional complexity of a two-phase approach to data collection. Data from a survey of mental disorders in Edmonton, Canada, which collected information on 3258 community residents using the Diagnostic Interview Schedule and the General Health Questionnaire, are used to demonstrate how two-phase methods would have changed the efficiency of an actual survey.",

author = "Newman, {Stephen C.} and Shrout, {Patrick E.} and Bland, {Roger C.}",

note = "Funding Information: Dr Newman was supported by the Alberta Mental Health Advisory Council, Alberta Mental Health Services and the Alberta Heritage Foundation for Medical Research.",

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The efficiency of two-phase designs in prevalence surveys of mental disorders

Abstract

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