Table 2. Usability of the Text Message Component (n = 9).

Item	M (SD) / n (%)
1. Poll questions were easy to locate	4.67 (0.50)
2. Was helpful	3.67 (1.32)
3. Ease of use	4.89 (0.33)
4. Text content was relevant/useful	4.00 (1.22)
5. Reading level was appropriate	4.11 (0.78)
6. Message length was appropriate	3.44 (0.73)
7. Frequency of messages was appropriate	3.11 (0.60)
8. Quantity of messages was appropriate	3.33 (0.50)
9. Length of intervention was appropriate	3.33 (0.50)
10. Others would use it (yes/no)	7 (78)
11. Could use wherever you wanted (yes/no)	8 (89)

Note. Questions 1-4, higher scores are better; questions 5-9, a score of 3 is best.