Document Classification

Section Type: RESULTS

Text: No significant difference in prevalence of daily smoking was found between students in the control and experimental districts, either at grade 12 (difference [Delta] = 0. 2 %, 95 % confidence interval [CI] = -4. 6 % to 4. 4 %, and P =. 91 for girls ; Delta = 0. 3 %, 95 % CI = -5. 0 % to 5. 5 %, and P =. 89 for boys) or at 2 years after high school (Delta = -1. 4 %, 95 % CI = -5. 0 % to 1. 6 %, and P =. 38 for girls ; Delta = 2. 6 %, 95 % CI = -2. 5 % to 7. 7 %, and P =. 30 for boys).