. Author manuscript; available in PMC: 2016 Sep 1.

Published in final edited form as: Alcohol Clin Exp Res. 2015 Aug 6;39(9):1740–1748. doi: 10.1111/acer.12829

Table 2.

Individual-based associations between bulimic behaviors and early risky behaviors.

	N (in twins)	Model 1¹	Model 2²	Model 3³
Early Alcohol Experimentation	3532	1.86 (1.50– 2.31)^*	1.91 (1.54– 2.38)^*	1.57 (1.23– 2.01)^*
Early Regular Alcohol Use	3518	2.27 (1.60– 3.23)^*	2.48 (1.73– 3.56)^*	1.91 (1.30– 2.80)^*
Early Nicotine Experimentation	3526	1.61 (1.35– 1.91)^*	1.58 (1.33– 1.88)^*	1.37 (1.13– 1.66)^*
Early Regular Nicotine Use	3510	1.64 (1.29– 2.07)^*	1.65 (1.30– 2.10)^*	1.32 (1.01– 1.72)^*
Early Daily Nicotine Use	3518	1.56 (1.19– 2.03)^*	1.56 (1.19– 2.05)^*	1.18 (0.87– 1.60)
Early Cannabis Experimentation	3526	1.78 (1.33– 2.38)^*	1.77 (1.32– 2.38)^*	1.16 (0.84– 1.61)
Any Early Nicotine/Cannabis Experimentation	3538	1.61 (1.35– 1.91)^*	1.58 (1.33– 1.88)^*	1.38 (1.14– 1.68)^*
Any Early Substance Experimentation	3534	1.70 (1.43– 2.01)^*	1.68 (1.42– 2.00)^*	1.65 (1.38– 1.97)^*
Early Sex	3508	1.58 (1.22– 2.05)^*	1.39 (1.07– 1.81)^*	1.01 (0.75– 1.35)

Note. 95% confidence intervals are presented in parentheses. Statistically significant effects that survive Bonferroni correction (p<.013) are bolded.

Significant before Bonferroni correction (p<.05).

Adjusted for zygosity.

Adjusted for zygosity, age, BMI, and early menarche.

Adjusted for zygosity, age, BMI, early menarche, and other early risky behaviors (three out of four early alcohol experimentation, early nicotine experimentation, early cannabis experimentation, early sex- excluding the early risky behavior that was used as the exposure variable).