Table 3.
Multiple logistic regression predicting any response (1) versus no response (0) based on experimental condition and baseline characteristics.
| Model 1 | Model 2 | ||
|---|---|---|---|
| AOR (95% CI) p | AOR (95% CI) p | ||
| Experimental condition (vs. standard MTF) | |||
| Web-push | 1.05 (0.97, 1.14) 0.225 | 0.93 (0.65, 1.34) 0.370 | |
| Follow-up age (vs. 60) | |||
| 35 | 0.43 (0.37, 0.50) <.001 | 0.36 (0.22, 0.60) <.001 | |
| 40 | 0.42 (0.36, 0.50) <.001 | 0.52 (0.31, 0.87) 0.014 | |
| 45 | 0.45 (0.38, 0.53) <.001 | 0.48 (0.29, 0.80) 0.005 | |
| 50 | 0.63 (0.53, 0.74) <.001 | 0.75 (0.45, 1.25) 0.266 | |
| 55 | 0.76 (0.65, 0.90) 0.001 | 1.03 (0.63, 1.70) 0.900 | |
| Sex (vs. Female) | |||
| Male | 0.66 (0.61, 0.72) <.001 | 0.53 (0.41, 0.69) <.001 | |
| Race/ethnicity (vs. White) | |||
| Black | 0.32 (0.28, 0.38) <.001 | 0.35 (0.21, 0.56) <.001 | |
| Hispanic | 0.56 (0.47, 0.67) <.001 | 0.67 (0.39, 1.16) 0.151 | |
| Other | 0.58 (0.49, 0.69) <.001 | 0.72 (0.41, 1.25) 0.248 | |
| Parent education (vs. less than college) | |||
| College or more | 1.16 (1.07, 1.26) <.001 | 1.24 (0.94, 1.64) 0.131 | |
| Will graduate from 4-year college (vs. not definitely) | |||
| Definitely | 1.39 (1.27, 1.51) <.001 | 1.13 (0.86, 1.47) 0.381 | |
| Any lifetime substance use (age 18) | |||
| Any alcohol (vs. none) | 0.92 (0.81, 1.05) 0.225 | 0.65 (0.42, 1.01) 0.057 | |
| Any cigarettes (vs. none) | 0.85 (0.77, 0.95) 0.004 | 1.04 (0.75, 1.44) 0.825 | |
| Any marijuana (vs. none) | 0.72 (0.65, 0.80) <.001 | 0.69 (0.50, 0.96) 0.028 | |
| Any other illicit drugs (vs. none) | 0.86 (0.78, 0.95) 0.003 | 0.98 (0.72, 1.33) 0.903 | |
| Web-push x follow-up age | |||
| x Age 35 | 1.13 (0.82, 1.51) 0.659 | ||
| x Age 40 | 0.87 (0.64, 1.19) 0.659 | ||
| x Age 45 | 0.96 (0.71, 1.30) 0.795 | ||
| x Age 50 | 0.89 (0.66, 1.21) 0.659 | ||
| x Age 55 | 0.82 (0.61, 1.10) 0.656 | ||
| Web-push x male | 1.16 (0.98, 1.36) 0.514 | ||
| Web-push x race/ethnicity | |||
| x Black | 0.95 (0.70, 1.30) 0.795 | ||
| x Hispanic | 0.88 (0.62, 1.25) 0.659 | ||
| x Other | 0.86 (0.60, 1.24) 0.659 | ||
| Web-push x parental education | 0.96 (0.80, 1.14) 0.772 | ||
| Web-push x college plans | 1.15 (0.97, 1.36) 0.514 | ||
| Web-push x alcohol use | 1.25 (0.96, 1.64) 0.514 | ||
| Web-push x cigarette use | 0.88 (0.72, 1.08) 0.656 | ||
| Web-push x marijuana use | 1.03 (0.84, 1.26) 0.795 | ||
| Web-push x illicit drug use | 0.92 (0.76, 1.11) 0.659 | ||
Note. Unweighted n = 12,242; Model 1 does not include interaction terms. p-values from logistic regression models for interaction terms account for multiple testing. MTF = Monitoring the Future; CI = confidence interval; AOR = adjusted odds ratio. Bold font indicates significance with p < 0.05.