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. Author manuscript; available in PMC: 2011 Nov 1.
Published in final edited form as: Am J Health Behav. 2010 NOV-DEC;34(6):776–787. doi: 10.5993/ajhb.34.6.12

Table 2. Validity of Self-reported Cocaine Use as Compared to Urinalysis Results.

Mean SD Range
Sensitivity (%) 85.2 6.3 74.4 -100.0
Specificity (%) 92.4 4.7 79.7 - 97.8
Agreement Rate (%) 89.5 4.3 78.7 - 97.7
Kappa 0.78 0.10 0.46 - 0.95