Table 2.
Predictor | Wald χ2 (df = 4)a | Equation |
|||
---|---|---|---|---|---|
Sexually activeb Yes/no | Partner typec Casual/main | Unprt. sex w maind Unprt./Prt. | Unprt. sex w casuale Unprt./Prt. | ||
Years age | 12.20* | 1.04 (0.97, 1.12) | 0.92 (0.75, 1.13) | 1.29** (1.12, 1.51) | 1.13 (0.87, 1.47) |
Race (white) | 8.44 | 1.50 (1.12, 2.01)** | 0.59 (0.27, 1.28) | 1.01 (0.51, 1.97) | 1.19 (0.33, 4.29) |
College (yes) | 19.55** | 0.57 (0.42, 0.75)** | 0.93 (0.45, 1.92) | 0.71 (0.40, 1.28) | 2.48 (0.60, 4.16) |
Employed (yes) | 2.57 | 0.96 (0.75, 1.23) | 0.73 (0.38, 1.42) | 1.31 (0.74, 2.31) | 0.62 (0.20, 1.87) |
Impulsivity | 5.13 | 1.03 (1.00, 1.07) | 0.99 (0.92, 1.07) | 0.99 (0.92, 1.07) | 1.04 (0.94, 1.16) |
Any recent cocaine (yes) | 2.73 | 0.82 (0.61, 1.12) | 1.23 (0.61, 2.51) | 1.44 (0.65, 3.18) | 0.92 (0.32, 2.62) |
Used alcohol (yes) | 43.15** | 1.46 (1.24, 1.73)** | 1.61 (1.08, 2.38)* | 1.15 (0.84, 1.60) | 0.79 (0.46, 1.37) |
Used marijuana (yes) | 32.49** | 1.60 (1.33, 1.93)** | 1.18 (0.69, 2.00) | 0.88 (0.59, 1.31) | 2.58 (1.10, 6.09)* |
Significance tests and 95% confidence interval estimates are based on robust variance estimators adjusted for within subject clustering (n = 308 participants observed for 28,198 person days)
P < 0.05,
P < 0.01
Test of the null hypothesis that the four coefficients giving the estimated effect of the predictor on the four decisions are jointly 0
Estimated effect on the odds (95% CI) of being sexually active
Estimated effect on the odds (95% CI) of a casual partner on days when sexually active
Estimated effect on the odds (95% CI) of having unprotected sex on days when sexually active with a main partner
Estimated effect on the odds (95% CI) of having unprotected sex on days when sexually active with a casual partner