TABLE 4

Multinomial Logistic Regression Analysis of Adolescent Smoking Trajectories Based on Exposure to Parental Smoking at Baseline, Defined as a Category or Duration of Adolescents’ Previous Years of Exposure to Parental Smoking

Model 1: Parents’ Baseline Smoking Status CategoryModel 2: Years of Exposure to Parental Smoking Before Baseline by Parents’ Baseline Smoking Status
Trajectory GroupTrajectory Group
Early Regular n = 24Early Experimenter n = 94Late Experimenter n = 165P ValueEarly Regular n = 24Early Experimenter n = 94Late Experimenter n = 165P Value
Demographics
 Adolescent baseline age3.861.751.20<.0013.681.711.20<.001
2.44–6.101.43–2.141.00–1.452.41–5.621.40–2.090.99–1.44
 Parent white race7.821.041.60.16310.180.381.80.149
0.90–66.240.44–2.470.76–3.380.91–114.540.16–0.870.86–3.76
 Parent college education0.320.420.77.1620.340.380.71.103
0.06–1.910.18–0.980.41–1.420.51–2.250.16–0.870.38–1.33
 Parents married0.460.320.88.0340.360.280.84.015
0.10–2.140.13–0.770.41–1.860.08–1.630.11–0.690.40–1.78
 Income >$60 000/y1.421.951.81.1481.410.841.94.119
0.37–5.500.89–4.281.04–3.160.37–5.340.40–1.780.89–4.25
Parental smoking
 Current, dependent9.164.611.94.0161.181.141.06.010
1.66–50.671.52–13.960.68–5.561.05–1.331.04–1.250.96–1.17
 Current, nondependent9.964.522.89.0341.231.151.14.174
1.67–59.441.32–15.421.16–7.171.01–1.500.98–1.340.99–1.30
 Former daily/weekly0.761.841.57.2560.801.051.03.426
0.13–4.450.83–4.060.90–2.730.56–1.140.94–1.180.96–1.12
  • In Model 1, parental smoking is defined categorically based on parents’ baseline smoking status. In Model 2, parental smoking is defined as adolescents’ total years of exposure to parental smoking before baseline separated by their parents’ smoking status at baseline. ORs and 95% CIs displayed. The reference group for ORs is adolescents who were never smokers (n = 123).