Table 5.

Gender differences

Variables	Females (n = 159)		Males (n = 176)
	IRR	[95% CI]	IRR	[95% CI]
Age	1.33**	[1.05, 1.68]	1.10	[0.94, 1.30]
Non-Hispanic White	1.00	[0.74, 1.34]	0.91	[0.70, 1.16]
Perceived best frend alcohol use	1.13**	[1.02, 1.24]	0.99	[0.87, 1.12]
Typical number of drinks	1.17**	[1.11, 1.24]	1.25**	[1.16, 1.36]
Your home	0.58*	[0.35, 0.93]	0.93	[0.58, 1.49]
Number of people at event	1.00	[0.99, 1.01]	1.00	[1.00, 1.00]
Adult responsible	0.73*	[0.54, 0.98]	1.06	[0.77, 1.45]
More boys than girlsa	1.22	[0.82, 1.80]	0.69**	[0.52, 0.91]
More girls than boysa	1.08	[0.68, 1.72]	1.16	[0.65, 2.07]
Ease of access	0.95	[0.72, 1.24]	1.43**	[1.11, 1.83]

Notes: IRR = incident rate ratio; CI = confidence interval. ^aReferent group = equal numbers of boys and girls.

^*p <.05;

^**p <.01.