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.
Range is 1 – 5, where 1 = “mostly A’s”, and 5 = “mostly F’s.”
According girls’ zip codes and Rural-Urban Commuting Area Codes, a Census tract-based classification system.
Four or more drinks within a couple of hours.
Use of the following: club drugs, cocaine, ecstasy, hallucinogens, heroin, inhalants, methamphetamines, steroids, and/or prescription drugs