Cannabis use: consistency and validity of self‐report, on‐site urine testing and laboratory testing
- 11 December 2002
- Vol. 97 (s1) , 98-108
- https://doi.org/10.1046/j.1360-0443.97.s01.1.x
Abstract
Aims To evaluate the agreement between adolescent self‐reported cannabis use, “on‐site” qualitative urine screening, and quantitative laboratory testing. Design A cross‐sectional study of intake an...Keywords
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