Table 1.
Demographic and clinical characteristics, and substance use ratings, in CHR and HC groups.
| CHRA n=519 | HC n=204 | ||||
|---|---|---|---|---|---|
|
| |||||
| n (%) | n (%) | χ2 | p-value | ||
| Sex | |||||
| Male | 314 (60.5) | 107 (52.5) | 3.90 | 0.05 | |
| Female | 205 (39.5) | 97 (47.5) | |||
| Race | |||||
| First NationsAsian Black Latin America/Middle East/White Interracial |
6 (1.2) 40 (8.7) 88 (17.0) 332 (64.1) 52 (10.0) |
4 (2.0) 23 (11.2) 36 (17.6) 120 (58.9) 21 (10.3) |
5.81 | 0.76 | |
| AUS/DUS cannabis use severity | |||||
| 387 (74.6) | 204 (100.0) | 63.47 | <0.001 | ||
| Abstinent Use without impairment Abuse Dependence |
109 (21.0) 21 (4.0) 2 (0.4) |
0 (0.0) 0 (0.0) 0 (0.0) |
|||
| AUS/DUS cannabis use frequency | |||||
| Abstinent 1–4 times per month 1–4 times per week Almost daily Missing | 387 (74.7) 67 (12.9) 49 (9.5) 15 (2.9) 0 (0.0) |
204 (100.0) 0 (0.0) 0 (0.0) 0 (0.0) 0 (0.0) |
60.39 | <0.001 | |
| AUS/DUS tobacco use severity | |||||
| Abstinent Use without impairment Abuse Dependence Missing |
387 (74.6) 120 (23.1) 5 (1.0) 7 (1.3) 0 (0.0) |
187 (91.7) 15 (7.4) 0 (0.0) 0.(0.0) 2 (1.0) |
29.73 | <0.001 | |
| AUS/DUS alcohol use severity | |||||
| 296 (57.0) | 101 (49.5) | 9.72 | 0.02 | ||
| Abstinent Use without impairment Abuse Dependence Missing |
210 (40.5) 9 (1.7) 6 (1.2) 0 (0.0) |
102 (50.0) 0 (0.0) 0 (0.0) 1 (0.5) |
|||
| Mean (SD) | Mean (SD) | t | p-value | ||
| Age (years) | 18.6 (4.2) | 20.1 (4.8) | 4.00 | <0.001 | |
| Education (years) | 11.4 (2.8) | 12.9 (3.6) | 5.95 | <0.001 | |
Note. CHR, Clinical High Risk; HC, Healthy Controls; SD, Standard Deviation.
A
Includes CHR cannabis users and non-users.