Appendix 9.
Association between protective factors and substance use and self-harm items among the co-twin model without psychopathology adjustment among multiple imputation dataset.
| OR (95% CI) | |||||
|---|---|---|---|---|---|
|
|
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| Alcohol Use Cutoff (AUDIT) | Any Drug Use (DUDIT) | Any Cigarette Use | Any Snuff Use | Suicide attempt/self-harm | |
|
| |||||
| Co-twin control without adjustment for psychopathology a | |||||
| Sports participation (parent-reported) | 1.09 (0.99, 1.19) | 0.99 (0.84, 1.17) | 1.07 (0.95, 1.20) | 1.17 (1.03, 1.32)* | 0.90 (0.81, 0.99)* |
| Physical activity (twin-reported) | 0.97 (0.89, 1.07) | 0.89 (0.76, 1.04) | 0.94 (0.85, 1.03) | 1.01 (0.91, 1.11) | 0.77 (0.71, 0.83)** |
| Positive friendship quality (twin-reported) | 1.15 (1.06, 1.25)** | 1.03 (0.90, 1.18) | 1.18 (1.06, 1.32)** | 1.18 (1.07, 1.31)** | 0.93 (0.84, 1.02) |
Note: Includes adjustment for biological sex. All outcomes are dichotomous. Based 18,234 unique individuals (182,340 observations after 10 imputations).
*
Statistically significant at p<0.05.
**
Statistically significant at p<0.01.
a
Adjusted for A-TAC summed scores for concentration/attention, impulsivity/activity, opposition, conduct, psychosis, and eating symptomology.