Table 1.
Text message type and frequency by treatment group
| SMS message type | Targeted | Tailored | Control | |
|---|---|---|---|---|
| Tips related to monitoring | 2 texts per week | 2 texts per week | 2 texts per week | |
| Prompts related to self-monitoring | Query regarding which behaviors were monitored | 1 text per week (W, C, P) | 2 texts per week (W, C, P) | 1 text per week (M, E, B) |
| Prompt for data to drive tailored messaging | – | 6 texts per week AM reminder (n = 3/week)/ PM prompt for data (n = 3/week) | – | |
| Feedback on the number of days successfully submitted monitoring data | 1 text per week | |||
| Tips to address high-risk weight loss behaviors | 2 texts per week (general) | 2 texts per week (personalized) | 2 texts per week (general) | |
| Reminder to review Facebook content | 2 texts per week | 2 texts per week | 2 texts per week | |
Total number of days per week receiving a text for all groups was 7. The total number of outgoing texts per week was 7 for targeted and control and 15 for tailored.
B, body image; C, calories; E, energy; M, mind; P, physical activity minutes; W, weight.