Table A2.

Odds ratio (OR) (95% confidence interval (CI)] for weekly drinking among girls and boys by alcohol control policies: multi-level logistic regression adjusted for age.

Fixed effects		Girls		Boys
		OR (95% CI) P-value		OR (95% CI) P-value
Alcohol control policies
Minimum purchasing age	20–21 years	1.00 (ref.)	0.04	1.00 (ref.)	0.01
	18 years	2.72 (1.33–5.54)		2.91 (1.39–6.06)
	16 years	2.31 (1.07–4.99)		2.72 (1.23–6.02)
	No age limit	3.17 (1.31–7.65)		4.63 (1.87–11.48)
Availability policies	Strong	1.00 (ref.)	0.004	1.00 (ref.)	<0.001
	Medium	2.25 (1.33–3.82)		2.72 (1.77–4.20)
	Weak	2.49 (1.46–4.27)		3.45 (2.22–5.34)
Alcohol Control Policy Index	Strong	1.00 (ref.)	0.05	1.00 (ref.)	0.03
	Medium	1.92 (1.10–3.37)		1.83 (1.05–3.21)
	Weak	1.74 (1.00–3.01)		2.10 (1.21–3.02)
Advertising restrictions	Strong	1.00 (ref.)	0.04	1.00 (ref.)	0.10
	Medium	1.26 (0.76–2.27)		1.40 (0.75–2.60)
	Weak	2.00 (1.15–3.48)		1.89 (1.06–3.38)

Significant P values (P < 0.05) are marked in bold.