Table 1.
Substance Abuser's Characteristics by Type of Primary Drug
| Parameter | Primary Drug | |||
|---|---|---|---|---|
| Heroin n=629 |
Cocaine n=694 |
Meth n=470 |
Total N=1793 |
|
| Male (%)** | 562 (89.4) | 490 (79.6) | 254 (54.0) | 1306 (72.8) |
| Age at Enrollment (yr)**,1 | ||||
| 30 or younger (%) | 424 (67.4) | 179 (25.8) | 210 (44.7) | 813 (45.3) |
| Mean (SD) | 28.5 (9.1) | 34.9 (6.8) | 32.5 (7.2) | 32.0 (8.2) |
| Age at First Use (yr)**,1 | ||||
| 20 or younger (%) | 476 (75.7) | 297 (42.8) | 313 (66.6) | 1086 (60.6) |
| Mean (SD) | 18.9 (4.7) | 23.0 (6.8) | 19.7 (5.5) | 20.7 (6.1) |
| Ethnicity (%)**,2 | ||||
| White | 223 (35.5) | 138 (19.9) | 255 (54.3) | 616 (34.4) |
| Black | 58 (9.2) | 457 (66.0) | 61 (13.0) | 576 (32.2) |
| Hispanic | 336 (53.4) | 75 (10.8) | 123 (26.2) | 534 (29.8) |
| Asian/Other | 12 (1.9) | 22 (3.2) | 31 (6.6) | 65 (3.6) |
| Length of Observation (yr)**,1 | ||||
| w/ incarceration | ||||
| ≥ 20 years (%) | 502 (79.8) | 291 (41.9) | 202 (43.0) | 995 (55.5) |
| Median (Range) | 32 (3-58) | 19 (2-55) | 19 (3-41) | 22 (2-58) |
| w/o incarceration | ||||
| ≥ 20 years (%) | 383 (60.9) | 263 (37.9) | 164 (34.9) | 810 (45.2) |
| Median (Range) | 23 (3-50) | 18 (2-48) | 17 (1-41) | 19 (1-50) |
| Primary Substance % Usage**,1 | ||||
| Mean (SD) | 61.0 (26.0) | 50.8 (23.5) | 44.1 (24.0) | 52.6 (25.4) |
| Alcohol % Usage**,1 | ||||
| Mean (SD) | 45.3 (33.4) | 62.0 (33.8) | 52.3 (32.5) | 53.6 (34.1) |
**
p < 0.001;
1
p-value from Analysis of Variance;
2
p-value from Chi-square test.