Table 2.
Reports of Respondents’ Own Drug and Sexual Behavior and Expectancies by Mixed-Mode Assignment
| In-person first n = 178 % | Web first n = 181 % | P | |
|---|---|---|---|
| Single items | |||
| In the past 30 days... | |||
| Drank alcohol | 59.3 | 55.0 | .692 |
| Drank >5 drinks on one occasion | 35.0 | 41.7 | .837 |
| Used marijuana | 37.3 | 27.6 | .018 |
| Used cocaine | 5.1 | 6.6 | .472 |
| Used other opiates | 13.0 | 11.0 | .371 |
| Drove car after drinking/drug use | 16.4 | 11.0 | .172 |
| Rode in a car w/someone drinking or using drugs | 23.2 | 19.3 | |
| Had sex | 55.1 | 55.9 | .594 |
| Drank alcohol prior to sex | 33.3 | 46.2 | .071 |
| Used drugs prior to sex | 17.8 | 25.8 | .154 |
| Had >1 sex partner | 5.1 | 7.3 | .401 |
| Used condoms | 60.5 | 61.9 | .402 |
| Used other birth control | 74.4 | 75.0 | .744 |
| Ever had a sexually transmitted disease (STD) | 5.1 | 6.8 | .568 |
| Multiple-item measures | M (SD) |
M (SD) |
|
| Expectancies for alcohol... | |||
| Enhancing sex | 3.01 (0.77) | 3.06 (0.96) | .901 |
| Increasing risky sex | 3.73 (0.87) | 3.84 (0.94) | .440 |
| Decreasing inhibition | 3.73 (0.86) | 3.80 (0.78) | .413 |
| Expectancies for drugs... | |||
| Enhancing sex | 2.98 (0.86) | 3.04 (0.89) | .495 |
| Increasing risky sex | 3.53 (0.96) | 3.62 (0.95) | .350 |
| Decreasing inhibition | 3.53 (0.92) | 3.52 (0.88) | .847 |
| Rutgers Alcohol Problems Index | 1.67 (3.80) | 1.34 (2.68) | .101 |
Notes: In the in-person interview mode, these questions were self-administered on laptop computers. * p < .05. Significance levels of comparisons by mixed-mode condition assessed by logistic or linear regression models that adjusted for gender, living at home with parents or not, and previous report of behavior when available on the spring 2004 survey. Means and standard deviations are from unadjusted estimates.