| Interventiona n = 1126 | Placebo controla n = 563 | Adjusted estimateb (95% CI) | P-value |
---|---|---|---|---|
Primary outcome - % exceeding the upper limit of guidelines for total GWG | ||||
 Intervention effect | 48.1% (2.0%) | 46.2% (2.4%) | 1.09 (0.98, 1.20) | 0.12 |
 Intervention x Strata interaction (3df) |  |  |  | 0.19 |
Secondary outcome - % exceeding the upper limit of weekly GWG rate (kg/week) | ||||
 Intervention effect | 66.4% (2.0%) | 67.9% (2.3%) | 1.00 (0.94, 1.07) | 0.90 |
 Intervention x Strata interaction (3df) |  |  |  | 0.22 |
Secondary outcome analysis- total GWG (kg) | ||||
 Intervention effect | 13.73 (0.46) | 13.73 (0.45) | 0.10 (−0.58, 0.77) | 0.78 |
 Intervention x Strata interaction (3df) |  |  |  | 0.16 |