Table 1.

Prevalence of past-month binge drinking by gender and age among students in private high schools (n = 2612).

	Gender					Age
	Male		Female		Total	14-15		16-17		18-19		Total
Binge drinking frequency	n (wgt%)	95%CI	n (wgt%)	95%CI	n	n (wgt%)	95%CI	n (wgt%)	95%CI	n (wgt%)	95%CI	n
None	709 (59.7)	54.8 - 64.4	968 (70.6)	65.9 - 74.8	1677	608 (71.7)	66.7 - 76.1	1005 (63.7)	58.8 - 68.2	64 (47.5)	40.1 - 55.1	1677
1 time	138 (10.4)	8.1 - 13.3	139 (10.2)	8.6 - 11.9	277	81 (9.7)	6.9 - 13.4	176 (10.0)	8.1 - 12.4	19 (12.3)	7.5 - 19.4	276
2 times	110 (10.1)	8.4 - 12.2	109 (7.1)	5.4 - 9.2	219	67 (7.6)	6.2 - 9.3	135 (8.6)	7.3 - 10.1	16 (13.3)	7.2 - 23.3	218
3 to 5 times	150 (12.7)	10.2 - 15.7	107 (7.6)	5.7 - 10.0	257	59 (7.6)	5.5 - 10.4	178 (11.2)	8.6 - 14.5	21 (13.6)	8.6 - 21.0	258
6 to 9 times	45 (3.2)	2.0 - 5.0	43 (2.4)	1.5 - 3.8	88	23 (2.0)	1.0 - 4.1	56 (3.1)	2.0 - 4.6	8 (3.8)	1.8 - 7.8	87
10 or +	39 (3.9)	2.3 - 6.8	25 (2.2)	1.2 - 3.9	64	9 (1.4)	0.4 - 4.2	47 (3.4)	2.3 - 5.1	8 (9.4)	3.2 - 24.4	64
Total	1191 (100)		1391 (100)		2582*	847 (100)		1597 (100)		136 (100)		2580*

Wgt%: percentage weighted

*30 missing data for gender and 32 missing data for age.