Does multisite sampling improve patient heterogeneity in drug misuse research?

Abstract

The aim of this study was to investigate whether multisite sampling increased heterogeneity among a sample of cocaine users from São Paulo, Brazil. Six hundred and fourteen cocaine users were interviewed at 23 fixed sites plus an out-of-treatment sample. The sites were then regrouped into six main types: university outpatient clinics, public outpatient… (More)

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