Table 1.
Substance Use as a Predictor of Event-Level Condom Use (Fully Controlled Models)
| Drinking Predicting Condom Use |
Heavy Episodic Drinking Predicting Condom Use |
Number of Drinks Predicting Condom Use |
Marijuana Use Predicting Condom Use |
|||||
|---|---|---|---|---|---|---|---|---|
| Event-Level Predictors | Adj. OR | 95% CI | Adj. OR | 95% CI | Adj. OR | 95% CI | Adj. OR | 95% CI |
| Substance Use | 1.21 | 0.74,1.99 | .74 | 0.35,1.56 | .46* | 0.22,0.93 | 0.16* | 0.04,0.67 |
| Alternative Contraception | .24*** | 0.09,0.61 | .24*** | 0.14,0.42 | -- | -- | 0.23*** | 0.13,0.40 |
| New Romantic Partner | 2.04** | 1.25,3.34 | 2.09** | 1.28,3.41 | 2.27 | 0.68,7.55 | 1.89* | 1.15,3.12 |
| Known Casual Partner | 3.55*** | 1.73,7.30 | 3.22** | 1.49,6.95 | 3.81* | 1.22,11.88 | 3.32** | 1.58,7.00 |
| Unknown Casual Partner | 4.27** | 1.68,10.85 | 5.92*** | 2.17,16.21 | 3.65* | 1.05,12.72 | 4.69** | 1.80,12.24 |
| Substance Use * New Romantic Partner | -- | -- | -- | -- | -- | -- | 7.26* | 1.42,37.09 |
| Substance Use * Known Casual Partner | -- | -- | 2.15 | .69,6.97 | -- | -- | 9.15** | 1.89,44.23 |
| Substance Use * Unknown Casual Partner | -- | -- | -- | -- | -- | -- | 5.03 | 0.39,65.32 |
| Person-Level Predictors | B | 95% CI | B | 95% CI | B | 95% CI | B | 95% CI |
| Black Race | −1.27* | −2.41,−0.13 | −1.27* | −2.40,−0.13 | -- | -- | −1.25* | −2.39,−0.12 |
| Asian/Asian-American Race | -- | -- | -- | -- | 1.73* | .22,3.24 | -- | -- |
| Average Binge Drinking | −1.13+ | −2.29,0.04 | −1.09+ | −2.24,0.07 | -- | -- | −1.03+ | −2.18,0.13 |
| R2 Within | .22*** | .12,.32 | .23*** | .13,.32 | .08 | −.02,.17 | .23*** | .13,.32 |
| R2 Between | .03 | −.02,.09 | .03 | −.02,.08 | .07 | −.04,.19 | .03 | −.02,.08 |
+
p < .10
*
p < .05
**
p < .01
***
p < .001
Notes. Results are reported for four separate models, one for each form of substance use. -- indicates control variables and interaction terms not included in the target model. R2 within indicates the proportion of the variance in condom use within subjects (i.e., across different sexual events) explained by event-level predictors, while R2 between indicates the proportion of the variance in condom use between subjects (i.e., across different individuals) explained by person-level predictors.