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. Author manuscript; available in PMC: 2024 Feb 15.
Published in final edited form as: Dev Psychopathol. 2022 Aug 15;34(5):1781–1802. doi: 10.1017/S0954579422000724

Appendix 14.

Associations between protective factors and outcomes after dropping individuals without a reported close friend.

OR (95% CI)

Co-twin control with adjustment for child psychopathologya Alcohol Use Cutoff (AUDIT) Any Drug Use (DUDIT) Any Cigarette Use Any Snuff Use Suicide attempt/self-harm

Sports participation (parent-reported) 1.08 (0.98–1.20) 1.00 (0.83–1.20) 1.07 (0.95–1.22) 1.16 (1.02–1.32)* 0.91 (0.81–1.02)
Physical activity (twin-reported) 0.98 (0.88–1.08) 0.90 (0.75–1.08) 0.94 (0.84–1.06) 1.01 (0.91–1.13) 0.80 (0.72–0.87)**
Positive friendship quality (twin-reported) 1.13 (1.02–1.24)* 1.00 (0.85–1.18) 1.16 (1.02–1.31)* 1.16 (1.04–1.29)* 0.96 (0.88–1.05)

Note: Includes adjustment for biological sex. Based on 16,731 individuals.

*

Statistically significant at p<0.05.

**

Statistically significant at p<0.01.

a

Adjusted for ATAC summed scores for concentration/attention, impulsivity/activity, opposition, conduct, psychosis, and eating symptomology.