Table 2.

Differences between Male and Female Probands: Alcohol Involvement

	Male Probands (n = 37) M (SD)	Female Probands (n = 17) M (SD)	t	d
Alcohol Involvement: Past 1 Year
Number of drinking days	200.7 (120.6)	130.8 (118.1)	2.0	0.58
Drinks per drinking day	6.2 (5.0)	5.7 (5.8)	0.3	0.09
Binge drinking days	118.7 (129.8)	92.1 (115.4)	0.7	0.21
Alcohol Involvement: Past 1 Month
Number of drinking days	11.2 (11.0)	8.6 (8.8)	0.8	0.25
Drinks per drinking day	4.2 (5.5)	2.2 (1.8)	1.4	0.43
Binge drinking days	3.8 (5.9)	2.5 (4.2)	0.8	0.24
Alcohol-related problemsa	13.3 (11.1)	13.6 (12.7)	−0.10	−0.03
Alcohol Involvement: 2 Week IVR Period
Number of drinking days	8.1 (4.9)	6.9 (3.5)	0.7	0.26
Drinks per drinking day	5.9 (5.6)	2.8 (1.4)	1.6	0.66
Binge drinking days	1.9 (3.4)	1.1 (1.6)	0.7	0.27

Note. Degrees of freedom ranged from 48 to 52.

^aThe time frame for the SIP was the past 3 months.

d = Cohen’s d (Cohen, 1992).