Table 1.

Components of the interactive voice response and text message intervention.

Component	Description
Reminders for upcoming visits	Three days before and 1 day before each upcoming visit
“Recalls” after missed clinic visits	Recall 1 to 6 days after a missed visit
Reminders to refill medications	Monthly reminders to refill hypertension medications
Motivational adherence messages	Weekly, from the list in Multimedia Appendix 1
Inbound calling options	Direct dial options available to participants to reach scheduling staff, a member of the clinical team, or pharmacy to address urgent concerns during business hours