TABLE A1.
Prevalence of weekly or more frequent drugs used by PWID in the San Diego STAHR-II Cohort, 6 monthsa
| Variable | All subjects (n = 505) | Class 1 Methamphetamine, multi-routes of administration (n = 232) | Class 2 Heroin, primarily injection (n = 273) | P-value |
|---|---|---|---|---|
| Heroin smoke (n = 480) | 46 (9.6%) | 17 (7.5%) | 29 (11.5%) | .18 |
| Heroin snort (n = 463) | 27 (5.8%) | 8 (3.7%) | 19 (7.7%) | .95 |
| Heroin injection (n = 482) | 269 (55.8%) | 61 (26.5%) | 208 (82.5%) | <.001 |
| Cocaine smoke (n = 472) | 17 (3.6%) | 9 (4.1%) | 8 (3.2%) | .51 |
| Cocaine snort (n = 484) | 9 (1.9%) | 4 (1.8%) | 5 (1.9%) | .20 |
| Cocaine injection (n = 487) | 20 (4.1%) | 9 (3.9%) | 11 (4.2%) | .76 |
| Methamphetamine smoke (n = 480) | 194 (40.4%) | 167 (73.9%) | 27 (10.6%) | <.001 |
| Methamphetamine snort (n = 457) | 78 (17.1%) | 76 (34.4%) | 2 (0.8%) | <.001 |
| Methamphetamine injection (n = 486) | 193 (39.7%) | 193 (85.0%) | 0 (0.0%) | <.001 |
| Simultaneous heroin & cocaine injection (n = 264) | 27 (10.2%) | 8 (8.3%) | 19 (11.3%) | .77 |
| Simultaneous methamphetamine & cocaine injection (n = 75) | 3 (4.0%) | 3 (6.0%) | 0 (0.0%) | .19 |
| Simultaneous methamphetamine & heroin injection (n = 459) | 31 (6.8%) | 28 (12.2%) | 3 (1.3%) | <.001 |
| Ketamine injection (n = 38) | 2 (5.3%) | 0 (0.0%) | 2 (11.1%) | .15 |
| Oxycontin swallow (n = 500) | 22 (4.4%) | 11 (4.7%) | 11 (4.1%) | .47 |
| Oxycontin snort (n = 438) | 2 (0.5%) | 2 (1.0%) | 0 (0.0%) | .77 |
| Oxycontin injection (n = 108) | 5 (4.6%) | 4 (7.8%) | 1 (1.8%) | .91 |
| Prescription drug swallow (n = 503) | 86 (17.1%) | 35 (15.1%) | 51 (18.8%) | .46 |
| Prescription drug smoke (n = 309) | 1 (0.3%) | 0 (0.0%) | 1 (0.6%) | .20 |
| Prescription drug snort (n = 346) | 4 (1.2%) | 2 (1.3%) | 2 (1.1%) | .42 |
| Prescription drug injection (n = 499) | 6 (1.2%) | 3 (1.3%) | 3 (1.1%) | .56 |
| Marijuana smoke (n = 456) | 169 (37.1%) | 104 (48.1%) | 65 (27.1%) | <.001 |
| Binge drink (n = 503) | 107 (21.3%) | 54 (23.4%) | 53 (19.5%) | .03 |
a
Route of administration was ascertained only when participants indicated use of a particular drug.