Table 3 Agreement in detecting drug use by point-of-care urine drug screen (UDS) and Computer-Assisted Self Interview (CASI)
CASI reported 7-day use | UDS | Kappacoefficient | |||
|---|---|---|---|---|---|
(+) | (−) | total | |||
Any drugs | (+) | 84 (37.3%) | 10 (4.4%) | 94 (41.8%) | 0.59 |
(−) | 37 (16.4%) | 94 (41.8%) | 131 (58.2%) | ||
Total | 121 (53.8%) | 104 (46.2%) | 225 (100.0%) | ||
Marijuana | (+) | 57 (25.3%) | 8 (3.6%) | 65 (28.9%) | 0.68 |
(−) | 24 (10.7%) | 136 (60.4%) | 160 (71.1%) | ||
Total | 81 (36.0%) | 144 (64.0%) | 225 (100.0%) | ||
Cocaine | (+) | 39 (17.3%) | 3 (1.3%) | 42 (18.7%) | 0.71 |
(−) | 19 (8.4%) | 164 (72.9%) | 183 (81.3%) | ||
Total | 58 (25.8%) | 167 (74.2%) | 225 (100.0%) | ||
Opiates | (+) | 2 (0.9%) | 15 (6.7%) | 17 (7.6%) | 0.05 |
(−) | 15 (6.7%) | 193 (85.8%) | 208 (92.4%) | ||
Total | 17 (7.6%) | 208 (92.4%) | 225 (100.0%) | ||
Methamphetamine | (+) | 0 (0.0%) | 4 (1.8%) | 4 (1.8%) | −0.01 |
(−) | 5 (2.2%) | 216 (96.0%) | 221 (98.2%) | ||
Total | 5 (2.2%) | 220 (97.8%) | 225 (100.0%) | ||