Social Incentives to Improve Diabetes (iDiabetes)

University of Pennsylvania

Status: Completed

Conditions: Type II; Diabetes; Obesity

Treatments: Behavioral: Competitive social incentive; Behavioral: Supportive social incentive; Behavioral: Collaborative social incentive

Study type: Interventional

Funder types: Other

Identifiers

NCT02961192

825372

Details and patient eligibility

About

In this study, we will conduct a one-year, four-arm, randomized, controlled trial to compare three social incentive-based gamification interventions to control for promoting physical activity and weight loss toward improved glycemic control among type 2 diabetics.

Full description

This is a four-arm, one-year randomized, controlled trial. The study will be conducted using Way to Health, an automated information technology platform at the University of Pennsylvania that integrates wireless devices, conducts clinical trial randomization and enrollment processes, delivers messaging (text or email) delivers self-administered surveys, automates payment transfers, and securely captures data for research purposes.

The study team will identify potential participants from the electronic health record at the University of Pennsylvania Health System. Interested participants will be instructed to visit the study website to create an account, review and complete informed consent, and complete an eligibility survey. Eligible participants will be instructed to obtain a hemoglobin A1c and LDL-C laboratory test. If the hemoglobin A1c is 8.0 or greater and the participant is still interested in continuing the enrollment process, a wearable activity tracking device will be mailed to them. After that, the participant will be scheduled for an in-person visit with the study team to complete the enrollment process.

Participants will be randomly assigned in blocks of four groups to one of the four study arms stratified based on whether the group of individuals already knew each other or not. Groups will have three individuals unless the individuals were already socially connected prior to the study, in which case they will be allowed to be randomized as a group of two or three. Participants randomized to the control arm will receive no other interventions.

Each participant in the intervention arms will be asked to choose their goals for the study as follows: 1) Choose a weight loss goal that is 6%, 7%, or 8% of their baseline weight rounded up to the next pound; 2) Choose a daily step count goal that is 33%, 40%, or 50% greater than their baseline rounded up to the nearest hundred, or choose their own step goal as long as it is at least 1500 steps above their baseline; 3) Choose a HbA1c reduction goal of 1.5%, 2%, or 2.5%.

Participants in arms 2-4 will be entered into an intervention approach that has points and levels designed to incorporate insights from behavioral economics. On a daily basis, they will be asked to weigh-in. They will have a weekly weight target and mean step goal. Weekly feedback will differ among the three arms to induce the different social incentives.

The primary outcome variables are change in mean daily steps, weight in pounds, and hemoglobin A1c from baseline to end of the one-year study.

Enrollment: 361 patients

Sex: All

Ages: 18 to 70 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Age 18 years to 70 years
2. Ability to read and provide informed consent to participate in the study
3. Diagnosis of type 2 diabetes with a hemoglobin A1c of 8.0 or greater
4. Self-reported body mass index (BMI) of 25 or greater.
5. Smartphone or tablet compatible with the application for the wearable activity tracking device and wireless weight scale.

Exclusion criteria

1. Conditions that would make participation infeasible such as inability to provide informed consent, illiteracy or inability to speak, read, and write English
2. Conditions that would make participation unsafe such as pregnancy, previous diagnosis of an eating disorder, or history of unsafe weight loss practices
3. Already enrolled in another study targeting physical activity, weight loss, or glycemic control
4. Any other medical conditions or reasons he or she is unable to participate in the study for one year.

Trial design

Primary purpose: Health Services Research

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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361 participants in 4 patient groups

Control

No Intervention group

Description:

Participants will receive a wireless weight scale and a wearable activity tracker to monitor their weight and step counts.

Supportive

Experimental group

Description:

Participants will receive a wireless weight scale and a wearable activity tracker to monitor their weight and step counts. Additionally, participants will play a game designed with insights from behavioral economics. The game will involve points and levels. In addition to playing the game, participants will identify a family member or friend to receive updates and support them in their progress.

Treatment:

Behavioral: Supportive social incentive

Competitive

Experimental group

Description:

Participants will receive a wireless weight scale and a wearable activity tracker to monitor their weight and step counts. Additionally, participants will play a game designed with insights from behavioral economics. The game will involve points and levels. In this arm, participants will be placed into competitive groups with one or two other participants to play the game.

Treatment:

Behavioral: Competitive social incentive

Collaborative

Experimental group

Description:

Participants will receive a wireless weight scale and a wearable activity tracker to monitor their weight and step counts. Additionally, participants will play a game designed with insights from behavioral economics. The game will involve points and levels. In this arm, participants will be placed into collaborative groups with one or two other participants to play the game.

Treatment:

Behavioral: Collaborative social incentive