Table 2.
Substance use characteristics of the study sample at baseline assessment (N = 296)
| Variable | Mean (SD) or n (%) | ||||
|---|---|---|---|---|---|
|
| |||||
| A. METH−/HIV−(n = 73) | B. METH−/HIV+ (n= 90) | C. METH+/HIV−(n = 59) | D. METH+/HIV+ (n = 74) | Significant Differencesb | |
| Current METH | 0 (0%) | 0 (0%) | 3 (5%) | 17 (23%) | A,B,C<D |
| Dependence | |||||
| Lifetime | |||||
| Substance | |||||
| Dependence | |||||
| METH | 0 (0%) | 0 (0%) | 59 (100%) | 74 (100%) | A,B<C,D |
| Alcohol | 5 (7%) | 7 (8%) | 25 (42%) | 17 (23%) | A,B<D<C |
| Cannabis | 3 (4%) | 4 (4%) | 13 (22%) | 15 (20%) | A,B<C,D |
| METH Use Characteristics a | |||||
| Age of First Use | 24 (9) | 29 (10) | 22 (7) | 24 (7) | B>C,D |
| Cumulative Duration of Use (days) | 54 (62) | 131 (238) | 4413 (2424) | 2632 (2382) | A,B<D<C |
| Cumulative Quantity of Use (grams) | 5 (6) | 22 (63) | 4451 (3676) | 2525 (3673) | A,B<D<C |
| Recency of Use (days) | 2552 (2504) | 3593 (3037) | 121 (91) | 142 (168) | A,B>C,D |
| Alcohol Use Characteristics a | |||||
| Age of First Use | 16 (4) | 17 (4) | 14 (4) | 14 (4) | A,B>C,D |
| Cumulative Duration of Use (days) | 832 (936) | 1596 (1620) | 2933 (2586) | 1950 (1854) | A<B,D<C |
| Cumulative Quantity of Use (grams) | 3277 (6769) | 7720 (15949) | 22890 (23742) | 15649 (23993) | A<B<C,D |
| Recency of Use (days) | 610 (1351) | 545 (1517) | 627 (1470) | 380 (842) | |
| Cannabis Use Characteristics a | |||||
| Age of First Use | 18 (4) | 19 (5) | 15 (3) | 16 (5) | A>C; B>C,D |
| Cumulative Duration of Use (days) | 594 (1334) | 758 (1397) | 3322 (3306) | 3182 (3463) | A,B<C,D |
| Cumulative Quantity of Use (grams) | 196 (412) | 345 (828) | 2196 (3535) | 3741 (14531) | |
| Recency of Use (days) | 2810 (3622) | 2676 (3260) | 1433 (2393) | 1114 (2515) | A,B>C,D |
Note: METH = Methamphetamine; HIV = Human Immunodeficiency Virus
a
Statistics are based on observed data
b
Pairwise group comparisons were performed with Benjamini-Hochberg correction with a significance alpha level of .05. Group labels: A = METH−/HIV−, B = METH−/HIV+, C = METH+/HIV−, D = METH+/HIV+.