APP-ME: Addressing Place and People MicroEnvironments in Weight Loss Disparities

Aim 1: After participants have been consented over the phone or in clinic, the Research Assistants (RA) will schedule a baseline assessment. Baseline interviewer administered survey questions, assessments, and equipment set-up will be completed in participants' homes to allow a physical environment assessment of the home. Assessments and surveys will be carried out using Research Electronic Data Capture (REDCap; see Resources). The in-home baseline assessment piloted for the proposed study takes 1 to 1.5 hours. Global Positioning System (GPS) locating, accelerometry, bite monitoring, and EMA surveys will operate through the mHealth app over the immediate 2-4 week period. For GPS locating, the mHealth app uses software that identifies and sends the longitude and latitude at the time of EMA response to a secure IU server. Software then determines the address of the location and whether it is the participant's home, work, restaurant, retail store, etc. For messaging, the mHealth app uses "Push Notification" to deliver EMA requests to the device (i.e., smartphone). This bypasses the phone carrier's Short Message Service (SMS) gateway, which is not always reliable or secure. The mHealth app makes sure the messages are delivered and secure. Participants receive a notification and open the application to answer the EMA questions. The database is located in a secure network within Indiana University servers. None of the data are stored inside the smartphone at rest. The actual questions are very brief with radio button responses.

At the end of the 2-4 week window, RAs will return to the home to collect the accelerometer and bite counter which takes about 1 hour. The accelerometer and bite counter are to be marked by the RA with the study participants ID and data are retrieved. At this time, participants who responded to 75% or more of the messages over the 2-4 week period, will be randomized to Usual Care (UC) or Priming Arm for Aim 2 and given instruction on the next steps of study participation. Randomization will be carried out within each race group to ensure a balance in the number of subjects between the two treatment arms. The Investigator will computer-generate randomization lists in field envelopes to be provided to the RAs for treatment assignment.

Aim 2: The second aim of the study will last 6 months. Both UC and Priming arms will have full access to Healthy-Me coaches and classes as well as receive training and access to the mHealth app. When study participation is excluded, all apps and associated data will be removed from the smartphone. At no time will Patient Health Information (PHI) be stored on the smartphone. Smartphones will only be identified by study ID number and the developer will only have access to the participants' study ID number and smartphone data collected by the mHealth app. Subjects in UC and Priming will undergo similar assessments and procedures; however, the Priming arm participants will, in addition receive 6-8 message alerts per day. The application and notifications that will be used in the Priming arm will be built from each participants own library to be delivered at times and in locations that their Aim 1 data indicate they often experience an eating or sedentary cue. In short, this intervention counters an obesogenic cue with a "healthy" prime in real-time and location.

Finally, following 6 months of UC or Priming, blinded RAs will return to participants home to complete 6-month follow-up assessment and collect all study related equipment. The final assessment and surveys will take about 1-1.5 hours and all data captured will also be carried out in REDCap.