Reliability of homeless women's reports: concordance between hair assay and self report of cocaine use.


BACKGROUND To assess the concordance of homeless women's self-reported drug use with objective data. OBJECTIVE To determine whether objective data (e.g., hair assays) are necessary supplements to self reports in assessing homeless women's cocaine use. METHOD Self reports of cocaine use by 1,037 homeless women were compared to objective data based on… (More)


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