Fig. 1.

Program engagement, retention and retesting among intervention group participants who responded to the survey (N = 91, 46% of the participants in the intervention group). Higher proportions of participants who answered “Yes” to both of the questions “Do you think CHHS text messages are motivating for you all the time?” and “Do you think CHHS text messages help you with healthy eating and active living all the time?” remained engaged with the program (P = 0.07), underwent retesting (P < 0.001) and were retained in the program (P = 0.03).