Table 3.

Binary logistic regressions of heavy episodic drinking. Odds ratios (OR) with 95% confidence intervals (CI) and Nagelkerke’s R² (R²_N). n = 21,886.

	Crudea		Model 1b		Model 2c		Model 3d		Model 4e
	OR	95% CI	OR	95% CI	OR	95 % CI	OR	95% CI	OR	95% CI
Gender
Girl (ref.)	1.00	-	1.00	-	1.00	-	1.00	-	1.00	-
Boy	0.94⁎	0.88-1.00	1.04	0.98-1.12	1.06	0.99-1.14	1.06	0.98-1.13	1.06	0.98-1.13
Grade
9 (ref.)	1.00	-	1.00	-	1.00	-	1.00	-	1.00	-
11	3.20⁎⁎⁎	2.98-3.43	3.26⁎⁎⁎	3.03-3.50	3.13⁎⁎⁎	2.91-3.36	3.26⁎⁎⁎	3.03-3.50	3.25⁎⁎⁎	3.02-3.50
Year
2014 (ref.)	1.00	-	1.00	-	1.00	-	1.00	-	1.00	-
2016	0.81⁎⁎⁎	0.76-0.86	0.86⁎⁎⁎	0.80-0.92	0.82⁎⁎⁎	0.77-0.88	0.86⁎⁎⁎	0.80-0.91	0.86⁎⁎⁎	0.80-0.92
Family structure
Two parents in the same household (ref.)	1.00	-	1.00	-	1.00	-	1.00	-	1.00	-
Other	1.32⁎⁎⁎	1.24-1.41	1.30⁎⁎⁎	1.22-1.40	1.36⁎⁎⁎	1.27-1.45	1.30⁎⁎⁎	1.21-1.39	1.30⁎⁎⁎	1.21-1.39
Parental university education
No parent (ref.)	1.00	-	1.00	-	1.00	-	1.00	-	1.00	-
At least one parent	1.21⁎⁎⁎	1.13-1.29	1.30⁎⁎⁎	1.21-1.40	1.22⁎⁎⁎	1.13-1.30	1.30⁎⁎⁎	1.21-1.40	1.30⁎⁎⁎	1.21-1.40
Migration background
≥ 10 years in Sweden (ref.)	1.00	-	1.00	-	1.00	-	1.00	-	1.00	-
< 10 years in Sweden	0.37⁎⁎⁎	0.32-0.43	0.37⁎⁎⁎	0.32-0.43	0.35⁎⁎⁎	0.30-0.41	0.37⁎⁎⁎	0.32-0.43	0.37⁎⁎⁎	0.32-0.43
Impulsivity	2.26⁎⁎⁎	2.14-2.40	2.34⁎⁎⁎	2.20-2.48	-	-	2.32⁎⁎⁎	2.18-2.47	2.87⁎⁎⁎	2.40-3.43
Psychological problems	1.16⁎⁎⁎	1.12-1.20	-	-	1.15⁎⁎⁎	1.10-1.20	1.02	0.98-1.07	1.26⁎⁎	1.06-1.50
Impulsivity *psychological problems	-	-	-	-	-	-	-	-	0.92⁎	0.86-0.98
R2N	-		.15		.10		.15		.15

^aCrude: bivariate logistic regressions including one control/independent variable at the time.

^bModel 1 includes control variables and impulsivity.

^cModel 2 includes control variables and psychological problems.

^dModel 3 includes control variables, impulsivity and psychological problems.

^eModel 4 includes control variables, impulsivity, psychological problems, and impulsivity *psychological problems.

^⁎⁎⁎p < .001.

^⁎⁎p < .01.

^⁎p < .05.