Table 2. Adjusted Differences in Daily Steps Among the Study Groups.
| Variable | Control | Gamification | |
|---|---|---|---|
| Social support | Social support and loss-framed financial incentives | ||
| Steps per day at baseline, mean (SD), No. | 5881 (2038) | 6012 (2494) | 6105 (2320) |
| Main intervention perioda | |||
| Steps per day, mean (SD), No. | 6195 (3767) | 6709 (3827) | 7599 (3897) |
| Main adjusted modelb | |||
| Difference vs control and adjusted for baseline (95% CI) | NA | 433 (−337 to 1203) | 1224 (451 to 1996) |
| P value | NA | .81 | .005 |
| Follow-up perioda | |||
| Steps per day, mean (SD), No. | 6272 (3839) | 6213 (3666) | 6962 (3888) |
| Main adjusted modelb | |||
| Difference vs control and adjusted for baseline (95% CI) | NA | −160 (−983 to 663) | 564 (−261 to 1389) |
| P value | NA | .92 | .37 |
Abbreviation: NA, not applicable.
a
The main intervention period included weeks 5 to 12 and excluded the ramp-up phase. The follow-up period included weeks 13 to 20.
b
The main adjusted models use imputed data and adjust for baseline outcome measure and calendar month.