Table 2.
Lifetime rates of individual substance use disorder categories among family members
| Variable | Complete sample (n = 803) | Restricted sample (n = 633) |
| Proband, n (%) | ||
| AUD | 301 (37%) | 231 (36%) |
| CUD | 175 (22%) | 117 (18%) |
| AMP | 74 (9%) | 47 (7%) |
| HUD | 38 (5%) | 24 (4%) |
| Maternal, n (%) | ||
| AUD | 133 (17%) | 81 (13%) |
| CUD | 46 (6%) | 24 (4%) |
| AMP | 36 (4%) | 25 (4%) |
| HUD | 9 (1%) | 4 (<1%) |
| Paternal, n (%) | ||
| AUD | 337 (42%) | 262 (41%) |
| CUD | 94 (12%) | 58 (9%) |
| AMP | 38 (5%) | 26 (4%) |
| HUD | 15 (2%) | 7 (1%) |
| Sibling, n (%) | ||
| AUD | 252 (31%) | 252 (40%) |
| CUD | 166 (21%) | 166 (26%) |
| AMP | 67 (8%) | 67 (11%) |
| HUD | 41 (5%) | 41 (6%) |
| Within family, M (SD)a | ||
| AUD | 0.90 (0.81) | 0.94 (0.83) |
| CUD | 0.38 (0.60) | 0.39 (0.61) |
| AMP | 0.18 (0.42) | 0.19 (0.43) |
| HUD | 0.08 (0.29) | 0.08 (0.30) |
Notes: AUD = alcohol use disorder; CUD = cannabis use disorder; AMP = amphetamine use disorder; HUD = hallucinogen use disorder.
a
Within family AUD, CUD, AMP and HUD were computed as the sum of lifetime diagnoses within substance categories for mothers, fathers, and any siblings (minimum = 0, maximum = 3).