Document Classification

Section Type: RESULTS

Text: 0 % (0 / 470) of the intervention group and 0. 2 % (1/467) of the control group registered successfully online, risk difference -0. 2 (95 % CI -0. 6 -0. 2) ; Trial 2 : 4. 5 % (11/246) of the intervention group and 0. 4 % (1/245) of the control group were randomized into the Txt2stop trial, risk difference 4. 0 % (95 % CI 1. 4-6. 7) ; Trial 3 : 3. 5 % (14/405) of the intervention group and 0 % (0/406) of the control group were randomized into the Txt2stop trial, risk difference 3. 5 (95 % CI 1. 7-5. 2).