No significant program effects were observed for any of the intervention groups compared to the control group at T1 for the intention to engage in smoking-prompt , OR 0.67 ( 95 % CI 0.30-1 .50 ) , no-prompt , OR 0.76 ( 95 % CI 0.34-1 .67 ) - or for smoking behavior-prompt , OR 1.13 ( 95 % CI 0.13-9 .98 ) , no-prompt , OR 0.50 ( 95 % CI 0.04-5 .59 ) .