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

Published in final edited form as: Subst Abus. 2014 Dec 31;36(4):434–439. doi: 10.1080/08897077.2014.988323

Table 4.

Logistic regression models for an expected problem drinker possible self in 8^th grade predicting tobacco use in 9^th grade

	9^th grade tobacco use
Predictors		Model 1				Model 2				Model 3

	OR	SE	95% CI	p	OR	SE	95% CI	p	OR	SE	95% CI	p
Expected problem drinker	9.9	7.5	2.2–44.0	0.003	18.9	17.5	3.1–116.0	0.001	13.3	13.5	1.8–98.2	0.011
possible self
Social determinants
Family structure
Single-parent family (1)					0.7	0.4	0.2–2.1	0.478	0.6	0.4	0.2–2.0	0.384
Two-parent family (0)					1.0				1.0
Family cohesion
Ineffective cohesion (1)					0.5	0.3	0.2–1.8	0.327	0.4	0.3	0.1–1.6	0.198
Effective cohesion (0)					1.0				1.0
Parental alcohol problems					1.9	0.4	1.3–2.8	0.002	1.9	0.4	1.2–2.8	0.003
Perceived friends’ influence					2.1	0.6	1.2–3.7	0.014	2.0	0.6	1.1–3.5	0.021
Gender
Girl (1)					2.2	1.3	0.7–7.0	0.203	1.9	1.2	0.6–6.4	0.287
Boy (0)					1.0				1.0
8^th grade tobacco use	31.1	21.2	8.2–118.1	<0.001	56.7	48.9	10.5–306.8	<0.001	55.2	49.1	9.7–315.3	<0.001
9^th grade alcohol problems									2.0	0.7	1.0–4.2	0.060

LR χ² (df)	53.09 (2)				75.47 (7)				79.11 (8)
Prob > χ²	< 0.001				< 0.001				< 0.001
Pseudo R²	0.32				0.47				0.50

Note: OR = odds ratio; SE = standard error; CI = confidence interval; LR = likelihood ratio test