Table 2

Univariate analysis on the associations between related factors and the risk of adolescent current smoking

FactorsSmokers (N=1549; %)Non-smokers (N=17 993; %)OR95% CI
Parents smoking
 No433 (6.08)6688 (93.92)Ref.
 One parent1082 (8.88)11 104 (91.12)1.511.34 to 1.69
 Both34 (14.47)201 (85.53)2.611.79 to 3.81
Belief that smoking is harmful
 No57 (22.27)199 (77.73)Ref.
 Yes1492 (7.74)17 794 (92.26)0.290.22 to 0.40
Secondhand smoke exposure
 No499 (5.12)9242 (94.88)Ref.
 Yes1050 (10.71)8751 (89.29)2.221.99 to 2.48
School performance
 Below average759 (14.25)4568 (85.75)Ref.
 Average617 (6.28)9206 (93.72)0.400.36 to 0.45
 Excellent173 (3.94)4219 (96.06)0.250.21 to 0.29
Living with family
 No990 (9.39)9555 (90.61)Ref.
 Yes559 (6.21)8438 (93.79)0.640.57 to 0.71