Table 2

Baseline characteristics of participants with and without binge drinking data in young adulthood, Nicotine Dependence in Teens Study (Canada, 1999–2005)

CharacteristicBinge drinking dataP value
Yes (n=787)No* (n=506)
Male (%)45.1530.007
Age (year, mean (SD))12.7 (0.5)12.9 (0.6)<0.001
Mother university-educated (%)46.738.50.026
Single-parent family (%)8.310.90.16
French spoken at home (%)3327.60.235
No. cigs/month (mean (SD))7.2 (47.7)13.8 (73.5)0.087
Used alcohol at baseline (%)40.347.40.018
Parents smoke (%)35.244.60.001
Friends smoke (%)33.941.20.01
Depressive symptoms (mean (SD))2.1 (0.6)2.1 (0.7)0.43
Impulsivity (mean (SD))2.3 (0.9)2.4 (1.0)0.105
Novelty-seeking (mean (SD))2.9 (0.8)3.0 (0.9)0.158
  • *Participants’ missing data on binge drinking at either age 20 or 24 were excluded from the analyses.