Characteristics | Youth without HIV-1 | Youth with HIV-1 receiving ART | ||||
---|---|---|---|---|---|---|
 |  | VL > 50 | VL ≤ 50c | |||
Reference (n = 25) | Group I (n = 9) | Group II (n = 8) | Group III (n = 19) | Group IV (n = 8) | Group V (n = 19) | |
Substance use | None | Marijuana + Tobacco + Alcohol | None | None | Marijuana | Marijuana + Tobacco |
Group abbreviation | H–S− | H–S+[M/T/A] | H+V+S− | H+V−S− | H+V−S+[M] | H+V−S+[M/T] |
THCA conc. (ng/ml)a |  ≤ 1 | 118 [50, 336] | ≤ 1 | ≤ 1 | 122 [65, 242] | 212 [167, 322] |
Cotinine conc. (ng/ml)a |  ≤ 1 | 34 [13, 70] | ≤ 1 | ≤ 1 | ≤ 1 | 40 [18, 45] |
Years of regular usea | Â | Â | Â | Â | Â | Â |
 Marijuana | NA | 4.5 [3.0, 6.0] | NA | NA | 7.5 [5.8, 10.8] | 7.0 [5.0, 8.0] |
 Tobacco | NA | 4.5 [3.0, 6.0] | NA | NA | NA | 7.0 [5.5, 10.3] |
Age (years)a, # | 22 [20, 23] | 22 [20, 23] | 24.5 [23, 25] | 24 [23, 26] | 23 [22, 25] | 24 [22, 25] |
Male (%)†| 68 | 100 | 75 | 84 | 75 | 95 |
African American (%)‡ | 80 | 33 | 88 | 79 | 100 | 63 |
Years on ARTa, $ | 0 | 0 | 2.6 [2.2, 2.9] | 2.9 [2.4, 2.9] | 2.6 [1.4, 2.8] | 2.6 [2.5, 2.9] |
ART regimen (%)b, § | ||||||
 PIs | NA | NA | 88 | 63 | 63 | 79 |
 NRTIs | NA | NA | 100 | 95 | 100 | 89 |
 NNRTIs | NA | NA | 25 | 37 | 50 | 32 |
HIV-1 RNA (copies/mL plasma)a | NA | NA | 6959 [127, 19655] |  ≤ 50 |  ≤ 50 |  ≤ 50 |
CD4 Tcell count (cells/µL)a, ¶ | ||||||
 End of study | 751 [462, 864] | 692 [447, 873] | 574 [307, 818] | 736 [581, 964] | 624 [522, 862] | 688 [438, 850] |
 Nadir | NA | NA | 459 [269, 626] | 451 [341, 490] | 625 [416, 632] | 360 [285, 501] |