Table 4.
Urine toxicology screening results of 266 opioid-dependent patients on buprenorphine maintenance therapy
| Number of urine screens done per person per month of BMT, mean (range) | 1.6 (0.0–4.1) | ||
| Percent of patients with all urines collected testing negative for opioids, (95% CI) | 29.7 (24.1–35.2) | ||
| Percent of patients with all urines collected testing negative for cocaine, (95% CI) | 41.0 (35.7–46.4) | ||
| Percent of baseline urine screens positive for opioids, (95% CI) | 33.5 (27.0–39.0) | ||
| Percent of baseline urine screens positive for cocaine, (95% CI) | 26.7 (21.0–32.0) | ||
| Patients still on BMT at end of observation period (N=134) | Patients not on BMT at end of observation period (N=132) | p value | |
| Last urine screen positive for opioids, % (95% CI) | 24.4 (17.0–32.0) | 51.0 (41.0–60.0) | <0.01 |
| Last urine screen positive for cocaine, % (n) | 14.2 (19) | 40.0 (53) | <0.01 |
| Urine screens negative for opioids in last month of treatment or observation, % (n) | 72.4 (97) | 34.9 (46) | <0.01 |
| Urine screens negative for cocaine in last month of treatment or observation, % (n) | 81.3 (109) | 47.0 (62) | <0.01 |
| Urine screens negative for both opioids and cocaine in last month of treatment or observation, % (n) | 66.4 (89) | 20.5 (27) | <0.01 |
BMT: buprenorphine maintenance therapy