Table 2.
Odds Ratio (OR) and 95% Confidence Interval (CI) for the Natural Direct, Natural Indirect, and Total Effects of Depressive Symptoms On Daily/Weekly Cigarette Smoking Considering Mediation by Friends Smoking (Imputed Data)
| Young Adolescents (Age 13–14) (n = 1189) |
Mid Adolescents (Age 15–16) (n = 1107) |
Older Adolescents (Age 17–18) (n = 1075) |
Young Adults (Age 18–21) (n = 4482) |
|||||
|---|---|---|---|---|---|---|---|---|
| Effects | OR | (95% CI) | OR | (95% CI) | OR | (95% CI) | OR | (95% CI) |
| NDE | 1.06 | (0.85, 1.32) | 1.13 | (0.91, 1.39) | 1.09 | (0.88, 1.35) | 1.37 | (1.28, 1.49) |
| NIE | 1.09 | (1.01, 1.17) | 1.10 | (1.03, 1.18) | 1.02 | (0.95, 1.10) | 1.03 | (0.85, 1.05) |
| TE | 1.15 | (0.94, 1.41) | 1.24 | (1.01, 1.53) | 1.12 | (0.89, 1.39) | 1.35 | (1.28, 1.42) |
NDE = natural direct effect, NIE = natural indirect effect, TE = total effect, CI = confidence intervals. Models are adjusted for age, sex, household smoking, alcohol, physical activity, mother’s education (NDIT), social class of mother (ALSPAC).