Table 1.
Study flow.
| Study activity | Study period and timeline | |||||||
|
|
Enrollment | Allocation | Postallocation | |||||
|
|
0 month | 0 month | 1 month | 2 months | 3 months | 4 months | 5 months | |
| Enrollment | ||||||||
|
|
Eligibility screen | ✓ |
|
|
|
|
|
|
|
|
Information session | ✓ |
|
|
|
|
|
|
|
|
Informed consent | ✓ |
|
|
|
|
|
|
|
|
Randomization |
|
✓ |
|
|
|
|
|
| Treatments | ||||||||
|
|
Twitter + Fitbit |
|
|
✓ | ✓ | ✓ |
|
|
|
|
Fitbit only |
|
|
✓ | ✓ | ✓ |
|
|
| Measures | ||||||||
|
|
Web-based surveys |
|
|
✓ |
|
✓ |
|
✓ |
|
|
7-day accelerometers |
|
|
✓ |
|
✓ |
|
✓ |
|
|
Continuous Fitbit monitoring |
|
|
✓ | ✓ | ✓ | ✓ | ✓ |