Table 2

Indicators of susceptibility to smoking among children two years post-baseline

Evaluation groups*Evaluation strategy
AssignedExposedControlEfficacy evaluation†Effectiveness evaluation‡
(n=327)(n=210)(n=344)Exposed v controlAssigned v control
%yes%yes%yesOR§95% CIp ValueOR95% CIp Value
*Random assignment placed 327 participants in the treatment group; of these, 210 were exposed to ⩾3 of 5 core program modules.
†The efficacy evaluation compared parents who reported exposure to ⩾3 modules (n=210) with controls (n=344).
‡The effectiveness evaluation compared parents randomly assigned to treatment (n=327) with controls (n=344).
§Odds ratios adjusted for child’s sex, parent’s sex, parent’s education, and parent’s race.
Child attributes that reduce susceptibility
Believes parent likes to talk about smoking51.759.341.62.09(1.44 to 3.02)0.001.52(1.10 to 2.10)0.01
Affirms having social contract with parent73.877.368.21.54(1.03 to 2.31)0.031.30(0.92 to 1.83)0.13
Believes parent would detect smoking84.488.380.51.84(1.10 to 3.06)0.011.36(0.89 to 2.04)0.14
Expects parent will reward abstinence36.438.628.21.55(1.06 to 2.25)0.021.41(1.01 to 1.98)0.04
Child attributes that raise susceptibility
Intends to smoke in adolescence10.48.516.10.54(0.31 to 0.95)0.030.60(0.37 to 0.95)0.03
Has a best friend who has smoked25.319.230.80.49(0.32 to 0.76)0.000.73(0.52 to 1.03)0.07