mHealth+I Group
Participants in the mHealth+I group were allowed to use the mHealth app and also received 8 proactive calls in 3 months from a nurse specifically trained for this study (ie, in the first month, a weekly call; in the second and third months, a biweekly call). The calls lasted 10 to 12 minutes and were recorded for an independent review by the research team members to ensure service quality. The frequency and duration of the sessions were tested and validated in our previous studies [