Table 1.
Sample Demographic Characteristics, Parent Interview Status, and Associations with Cannabis Use Disorder (CUD) Onset among Probands (n = 719)
| Variable | Sample Demographic Characteristics | Associations with CUD Onset in Probands, HR [CI95] |
|||
|---|---|---|---|---|---|
| No CUD in Proband, (n = 583) |
CUD in Proband, (n = 136) |
Test Statistica | p-value | ||
| Proband Characteristics | |||||
| Male, % (SE) | 41.5 (2.0) | 50.8 (4.3) | 3.87 | .049 | 1.40 [1.01–1.97] |
| Non-white, % (SE) | 6.5 (1.0) | 8.9 (2.4) | 0.94 | .333 | 1.38 [0.83–2.32] |
| Pubertal timing, % (SE) | |||||
| Early vs. on-time | 18.3 (1.7) | 22.5 (3.8) | 1.06 | .302 | 1.31 [0.85–2.01] |
| Late vs. on-time | 14.1 (1.6) | 15.9 (3.5) | 0.23 | .630 | 1.16 [0.69–1.96] |
| Early vs. late | 57.8 (3.9) | 60.6 (7.4) | 0.11 | .735 | 1.12 [0.62–2.05] |
| History of repeating grade before age 12, % (SE) | 9.6 (1.2) | 14.2 (3.0) | 2.34 | .125 | 1.50 [0.93–2.39] |
| Family Demographic Variables | |||||
| Dual versus single parent household, % (SE) | 61.2 (2.0) | 43.9 (4.3) | 13.25 | <.001 | 0.53 [0.38–0.75] |
| At least one parent completed college, % (SE) | 45.5 (2.1) | 41.4 (4.2) | 0.75 | .387 | 0.87 [0.62–1.24] |
| Mean parent age at T1, M (SD) | 42.4 (5.8) | 41.1 (5.3) | 2.36 | .019 | 0.96 [0.93–0.99] |
| Number of older siblings, M (SD) | 0.9 (1.1) | 0.8 (1.1) | 0.39 | .698 | 0.97 [0.83–1.14] |
| Direct interview with mother, % (SE) | 75.9 (1.7) | 80.9 (3.4) | 1.64 | .201 | 1.30 [0.84–2.01] |
| Direct interview with father, % (SE) | 50.2 (2.1) | 39.7 (4.2) | 4.87 | .027 | 0.69 [0.49–0.98] |
Note. SE = standard error; M = mean; SD = standard deviation; HR = hazard ratio. Statistically significant hazard ratios are bolded.
a
Likelihood ratio chi-square and independent observation t-tests were conducted on categorical and continuous variables, respectively. Reference group = no proband cannabis use disorder.