Skip to main content
. Author manuscript; available in PMC: 2010 Jun 1.
Published in final edited form as: Eval Rev. 2009 Apr 7;33(3):211–225. doi: 10.1177/0193841X09333253

Table 5.

Cross-Tabulation of Responses to the 48-Hour Drug Use Question and the Results of Biological Assay for Marijuana Use

Negative Test
Result
Positive Test
Result
Total
No 48-hour drug use 285 (.960) 012 (.040) 344 (1.00)
Yes 48-hour drug use 024 (.480) 026 (.520) 050 (1.00)