Randomization
T2D
Computerized randomization was conducted in-house using a randomization function from the Xojo framework (Xojo, Inc). This occurred with a uniform allocation of 1:1 (block size 8) stratified by health condition (T2D, CHD, or both). Randomization automatically occurred following the baseline study visit and entry of baseline data into a secure REDCap (Research Electronic Data Capture; Vanderbilt University) web interface. The computerized platform connected to the SMS text messaging platform to send messages to the intervention participants automatically based on randomization. To minimize unblinding at follow-up, all participants were sent a message requesting them not to reveal treatment allocation to the data collectors.