Table 2.
Clinical and behavioral characteristics of patients.
| Characteristics | Poor Sleep | Total | p-Value | ||||
|---|---|---|---|---|---|---|---|
| Yes | No | ||||||
| n | % | n | % | n | % | ||
| Ever injected drugs | 64 | 61.0 | 188 | 64.8 | 252 | 63.8 | 0.48 |
| Concurrent drug use | 10 | 9.5 | 13 | 4.5 | 23 | 5.8 | 0.06 |
| Frequency of alcohol drink in the last 30 days | |||||||
| No | 57 | 54.3 | 127 | 43.7 | 184 | 56.6 | 0.14 |
| Every few weeks | 15 | 14.3 | 57 | 19.7 | 72 | 18.2 | |
| Every week | 13 | 12.4 | 28 | 9.7 | 41 | 10.4 | |
| Daily | 20 | 19.0 | 78 | 26.9 | 98 | 24.8 | |
| Frequency of smoking tobacco | |||||||
| No | 29 | 27.6 | 46 | 15.9 | 75 | 19.0 | 0.07 |
| Every few weeks | 5 | 4.8 | 15 | 5.2 | 20 | 5.1 | |
| Every week | 6 | 5.7 | 23 | 7.9 | 29 | 7.3 | |
| Daily | 65 | 61.9 | 206 | 71.0 | 271 | 68.6 | |
| Missed any dose in the last 30 days | 9 | 8.6 | 27 | 9.3 | 36 | 9.1 | 0.82 |
| Mean | SD | Mean | SD | Mean | SD | ||
| Age at onset of drug use | 26.3 | 7.6 | 25.8 | 7.9 | 25.9 | 7.8 | 0.42 |
| MMT duration (years) | 3.1 | 2.2 | 2.7 | 2.2 | 2.8 | 2.2 | 0.06 |
| MMT dose (mg) | 70.3 | 50.8 | 68.8 | 30.6 | 69.2 | 37.0 | 0.34 |
| MMT missed dose in the last 30 days | 0.1 | 0.4 | 0.3 | 1.8 | 0.3 | 0.1 | 0.80 |
| DASS-21 subscales | |||||||
| Depression | 2.4 | 4.9 | 1.2 | 2.4 | 1.5 | 3.1 | <0.01 |
| Anxiety | 4.8 | 4.5 | 3.1 | 3.6 | 3.6 | 3.9 | <0.01 |
| Stress | 3.2 | 4.5 | 1.7 | 3.0 | 2.1 | 3.5 | <0.01 |
MMT: Methadone Maintenance Treatment; DASS: Depression, Anxiety, and Stress Scale.