Table 2.
Unadjusted generalized estimating equations with binomial distribution (log link) and an unstructured working correlation on violence occurring in the following time-points (n = 592).
| ORa (95% CI) | p-Value | |
|---|---|---|
| Cannabisb | ||
| Use at 1 time-point | 1.60 (1.19–2.15) | 0.002 |
| Use at 2 time-points | 1.91 (1.27–2.86) | 0.002 |
| Use at 3 time-points | 2.72 (1.66–4.46) | <0.001 |
| Use at 4 time-points | 4.04 (1.99–8.19) | <0.001 |
| Cocaineb | ||
| Use at 1 time-point | 1.56 (1.12–2.17) | 0.009 |
| Use at 2 time-points | 1.19 (0.75–1.90) | 0.469 |
| Use at 3 time-points | 2.27 (1.49–4.80) | 0.001 |
| Use at 4 time-points | 1.89 (0.75–4.76) | 0.177 |
| Alcoholb | ||
| Use at 1 time-point | 1.42 (1.07–1.89) | 0.015 |
| Use at 2 time-points | 1.44 (1.02–2.04) | 0.039 |
| Use at 3 time-points | 1.99 (1.30–3.04) | 0.002 |
| Use at 4 time-points | 3.39 (1.99–5.78) | <0.001 |
aControlling for the effects of time.
bOrdinal variable (reference is no use of the substance across time-points).