Table 4.
Odds ratio results from logistic regression for onset of substance use.
| Predictors | Onset of weekly alcohol use OR (95% CI) | Onset of heavy episodic drinking OR (95% CI) | Onset of cigarette smoking OR (95% CI) | Onset of marijuana use OR (95% CI) | |
|---|---|---|---|---|---|
| Step 1 | Age | 3.14⁎⁎⁎ (1.99–4.94) | 1.98⁎⁎⁎ (1.40–2.79) | 1.83⁎⁎ (1.22–2.73) | 1.74⁎ (1.04–2.92) |
| Step 2 | Age | 3.09⁎⁎⁎ (1.91–5.00) | 2.08⁎⁎⁎ (1.43–3.04) | 1.83⁎⁎ (1.20–2.79) | 1.69 (.98–2.92) |
| Sensation seeking | 1.68⁎ (1.06–2.66) | 1.33 (.92–1.91) | 1.63⁎ (1.12–2.38) | 2.43⁎⁎ (1.32–4.46) | |
| Impulsivity | 1.35 (.92–1.98) | 1.62⁎⁎ (1.14–2.31) | 1.48# (.97–2.26) | 1.20 (.75–1.93) | |
| Step 3 | Age | 3.29⁎⁎⁎ (1.97–5.49) | 2.13 ⁎⁎⁎ (1.45–3.13) | 1.80⁎ (1.15–2.81) | 1.70# (.95–3.04) |
| Sensation seeking | 1.70⁎ (1.07–2.71) | 1.32 (.91–1.91) | 1.64⁎ (1.11–2.45) | 2.55⁎⁎ (1.39–4.67) | |
| Impulsivity | 1.35 (.90–2.02) | 1.63⁎⁎ (1.14–2.33) | 1.50# (.97–2.33) | 1.15 (.71–1.88) | |
| BART | 0.99 (.70–1.42) | 1.06 (.74–1.53) | 0.96 (0.65–1.43) | 0.90 (.58–1.40) | |
| PALT neutral | 1.09 (.78–1.52) | 0.96 (.70–1.31) | 0.77 (.43–1.39) | 0.76 (.40–1.43) | |
| PALT reward | 1.23 (.83–1.83) | 1.07 (.75–1.52) | 1.11 (.70–1.76) | 1.75# (.95–3.23) | |
| Delay discounting | 0.84 (.59–1.21) | 0.84 (.59–1.22) | 0.89 (.58–1.37) | 0.78 (.43–1.41) |
Note. Results indicate odds of indicating onset in the study period, relative to non-use. Results shown are pooled across 10 imputations. Higher values indicate higher odds of use.
#
p < .1.
⁎
p < .05.
⁎⁎
p < .01.
⁎⁎⁎
p < .001.