Table 3.
Final Multilevel Regression Model for Effects of Pre-Sex Substance Use on Risky Sex
| Fixed Effect | β | s.e. | t | OR | C. I. |
|---|---|---|---|---|---|
| Intercept | 0.30 | 0.13 | 2.30 | ||
| SAS - Initiation | −0.04 | 0.21 | −0.18 | 0.96 | (0.643, 1.446) |
| SAS - Refusal | 0.46 | 0.19 | 2.47* | 1.58 | (1.098,2.282) |
| SAS – STI/Pregnancy Prevention | −1.41 | 0.14 | −10.03*** | 0.24 | (0.184,0.321) |
| Sexual Partner | −0.81 | 0.21 | −3.94*** | 0.44 | (0.297,0.665) |
| 1 Pre-Sex Alcohol Only | 0.15 | 0.13 | 1.15 | 1.16 | (0.898,1.512) |
| x SAS - Initiation | 0.26 | 0.21 | 1.22 | 1.30 | (0.852,1.977) |
| SAS - Refusal | −0.06 | 0.18 | −0.31 | 0.95 | (0.661,1.352) |
| SAS – STI/Pregnancy Prevention | 0.22 | 0.15 | 1.50 | 1.25 | (0.934,1.670) |
| Pre-Sex Marijuana Only | −0.13 | 0.38 | −0.35 | 0.88 | (0.418,1.842) |
| x SAS - Initiation | −0.37 | 0.60 | −0.62 | 0.69 | (0.211,2.241) |
| SAS - Refusal | 0.43 | 0.50 | 0.86 | 1.53 | (0.580,4.051) |
| SAS – STI/Pregnancy Prevention | −0.56 | 0.46 | −1.22 | 0.57 | (0.231,1.403) |
| Pre-Sex Alcohol + Marijuana | 0.83 | 0.48 | 1.74 | 2.30 | (0.901, 5.865) |
| x SAS - Initiation | 1.45 | 0.90 | 1.62 | 4.26 | (0.735,24.703) |
| SAS - Refusal | −1.34 | 0.66 | −2.03* | 0.26 | (0.072,0.958) |
| SAS – STI/Pregnancy Prevention | 0.29 | 0.50 | 0.58 | 1.33 | (0.505,3.522) |
1
Comparison is to a day where no substance use occurred prior to the sexual event;
*
p < .05,
***
p < .001