Table 1.

Sample Characteristics and Comparability at Pretest (N = 788)

	Intervention (n = 396)		Control (n = 392)
Variable	%	M (SD)	%	M (SD)	t or X2	p-value
Age (R = 11 – 15 years)		13.66 (0.67)		13.72 (0.67)	1.365	.173
Ethnic/racial group					1.722	.788
White	64%		65%
Black	24%		25%
Hispanic	15%		15%
Other	18%		19%
Average school gradesa		1.69 (0.82)		1.67 (0.83)	−0.423	.672
Geographic areab					2.538	.281
Urban	83%		80%
Rural	10%		10%
Large Town	7%		10%
Parents’ education					0.032	.859
< 2 years of college	49%		50%
2 or > years of college	51%		50%
Past-month drug use:
Alcohol use		0.95 (4.45)		1.23 (4.86	0.824	.410
Binge drinkingc		0.25 (1.23)		0.36 (1.64)	0.999	.318
Cigarette use		0.89 (5.84)		0.85 (5.55)	−0.091	.928
Marijuana use		0.88 (5.50)		0.76 (4.76)	−0.320	.749
Other drug used		0.97 (5.19)		1.02 (4.16)	0.161	.872

Note. Past-month use of alcohol, cigarettes, marijuana, and other drugs is a count variable and ranges between 0 = 0 times and 71 = 71 or more times.

^aRange is 1 – 5, where 1 = “mostly A’s”, and 5 = “mostly F’s.”

^bAccording girls’ zip codes and Rural-Urban Commuting Area Codes, a Census tract-based classification system.

^cFour or more drinks within a couple of hours.

^dUse of the following: club drugs, cocaine, ecstasy, hallucinogens, heroin, inhalants, methamphetamines, steroids, and/or prescription drugs