Table 1.
Demographic characteristics at baseline and follow-ups (FU) 1, 2, and 3.
| Overalla n = 2684 |
Baselinea n = 803 |
FU1a n = 739 |
FU2a n = 651 |
FU3a n = 491 |
p-valueb | |
|---|---|---|---|---|---|---|
| Age at scan (years) |
17.58 (2.73) [12.02–25.07] |
16.21 (2.52) [12.02–21.96] |
17.30 (2.49) [12.99–22.93] |
18.29 (2.46) [13.98–23.98] |
19.32 (2.49) [14.92–25.07] |
<0.001 |
| Sex | >0.9 | |||||
| F | 1380 (51%) | 412 (51%) | 381 (52%) | 332 (51%) | 255 (52%) | |
| M | 1304 (49%) | 391 (49%) | 358 (48%) | 319 (49%) | 236 (48%) | |
| Race | ||||||
| African-American/Black | 310 (12%) | 96 (12%) | 87 (12%) | 73 (11%) | 54 (11%) | |
| African-American and Caucasian | 29 (1.1%) | 9 (1.1%) | 8 (1.1%) | 8 (1.2%) | 4 (0.8%) | |
| Asian | 210 (7.8%) | 64 (8.0%) | 59 (8.0%) | 51 (7.8%) | 36 (7.3%) | |
| Asian Pacific Islander | 4 (0.1%) | 1 (0.1%) | 1 (0.1%) | 1 (0.2%) | 1 (0.2%) | |
| Asian and White | 74 (2.8%) | 21 (2.6%) | 20 (2.7%) | 19 (2.9%) | 14 (2.9%) | |
| Caucasian/White | 2024 (75%) | 600 (75%) | 555 (75%) | 491 (75%) | 378 (77%) | |
| Native American/American Indian | 7 (0.3%) | 3 (0.4%) | 2 (0.3%) | 2 (0.3%) | 0 (0%) | |
| Native American and Caucasian | 5 (0.2%) | 2 (0.2%) | 1 (0.1%) | 1 (0.2%) | 1 (0.2%) | |
| None | 6 (0.2%) | 2 (0.2%) | 2 (0.3%) | 1 (0.2%) | 1 (0.2%) | |
| Pacific Islander | 12 (0.4%) | 4 (0.5%) | 3 (0.4%) | 3 (0.5%) | 2 (0.4%) | |
| Pacific Islander and Caucasian | 3 (0.1%) | 1 (0.1%) | 1 (0.1%) | 1 (0.2%) | 0 (0%) | |
| SES |
16.79 (2.47) [6.00–20.00] |
16.79 (2.49) [6.00–20.00] |
16.83 (2.45) [6.00–20.00] |
16.81 (2.48) [6.00–20.00] |
16.71 (2.45) [6.00–20.00] |
0.8 |
| Family AUD density | ||||||
| 0 | 2008 (75%) | 601 (75%) | 554 (75%) | 487 (75%) | 366 (75%) | |
| 0.5 | 392 (15%) | 117 (15%) | 108 (15%) | 96 (15%) | 71 (14%) | |
| 1 | 158 (5.9%) | 46 (5.7%) | 42 (5.7%) | 39 (6.0%) | 31 (6.3%) | |
| 1.5 | 72 (2.7%) | 22 (2.7%) | 19 (2.6%) | 17 (2.6%) | 14 (2.9%) | |
| 2 | 45 (1.7%) | 14 (1.7%) | 13 (1.8%) | 10 (1.5%) | 8 (1.6%) | |
| 2.5 | 4 (0.1%) | 1 (0.1%) | 1 (0.1%) | 1 (0.2%) | 1 (0.2%) | |
| 3 | 3 (0.1%) | 1 (0.1%) | 1 (0.1%) | 1 (0.2%) | 0 (0%) | |
| 4 | 2 (<0.1%) | 1 (0.1%) | 1 (0.1%) | 0 (0%) | 0 (0%) | |
| Drinking class (Cahalan scale) | <0.001 | |||||
| 0 | 1800 (67%) | 642 (80%) | 512 (69%) | 385 (59%) | 261 (53%) | |
| 1 | 471 (18%) | 110 (14%) | 122 (17%) | 131 (20%) | 108 (22%) | |
| 2 | 106 (3.9%) | 12 (1.5%) | 19 (2.6%) | 32 (4.9%) | 43 (8.8%) | |
| 307 (11%) | 39 (4.9%) | 86 (12%) | 103 (16%) | 79 (16%) | ||
| Baseline trauma (# of events) | >0.9 | |||||
| 0 | 1029 (38%) | 305 (38%) | 286 (39%) | 251 (39%) | 187 (38%) | |
| 1 | 887 (33%) | 265 (33%) | 239 (32%) | 218 (33%) | 165 (34%) | |
| 2 | 508 (19%) | 154 (19%) | 144 (19%) | 121 (19%) | 89 (18%) | |
| 3 | 181 (6.7%) | 56 (7.0%) | 49 (6.6%) | 42 (6.5%) | 34 (6.9%) | |
| 4 | 79 (2.9%) | 23 (2.9%) | 21 (2.8%) | 19 (2.9%) | 16 (3.3%) | |
| Lifetime marijuana use (days) |
26.15 (137.2) [0–2309] |
8.80 (86.3) [0–1712] |
16.78 (103.9) [0–1738] |
32.80 (146.5) [0–2119] |
59.82 (210.7) [0–2309] |
<0.001 |
| Lifetime tobacco use (days) |
19.37 (247.6) [0–10796] |
3.11 (36.4) [0–900] |
12.39 (106.4) [0–1827] |
19.80 (169.9) [0–3656] |
55.92 (525.6) [0–10,796] |
<0.001 |
n (%).
aStatistics presented: mean (SD) [minimum-maximum].
bStatistical tests performed: Kruskal–Wallis test; chi-square test of independence.
Bold values indicates statistical significant p-values (p < 0.05).