Table 4.
No SMS notification for questionnaires (n = 702) |
SMS notification for questionnaires (n = 692) |
£10 voucher at 24-month visit (n = 695) |
£10 voucher before 24-month visit (n = 699) |
|
---|---|---|---|---|
Host trial primary outcome data collected during home or clinic visit | 558 (79%) | 565 (82%) | 566 (81%) | 557 (80%) |
Adjusted risk difference (95% CI) | 2.4% (−1.8 – 6.5%) | −1.9% (−6.0 – 2.3%) | ||
Adjusted odds ratio (95% CI) | 1.15 (0.88 – 1.50) | 0.89 (0.69 – 1.17) |
Data shown are n (%) using the number randomised to each group as the denominator
Estimates are adjusted for host trial allocation
Odds ratio for interaction between study within a trial (SWAT) interventions from logistic regression model 0.67 (95% CI 0.39 – 1.14, p value 0.14)