Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Mean number of texts sent to respondents, by week of participation in the study
| Week | Mean (SD) |
| 1 | 10.88 (6.72) |
| 2 | 12.76 (7.08) |
| 3 | 8.96 (6.97) |
| 4 | 7.45 (6.82) |
| 5 | 7.71 (6.72) |
| 6 | 7.08 (7.88) |
| 7 | 6.12 (6.70) |
| 8 | 5.78 (7.15) |
| 9 | 5.98 (7.29) |
| 10 | 4.35 (7.01) |
| 11 | 3.25 (5.82) |
| 12 | 2.59 (5.63) |
| 13 | 1.35 (3.49) |
