Fig. 2

Outcome definitions in randomized controlled trials that used biometric monitoring devices (BMDs), the example of diabetes control (n = 21 trials with 266 outcomes and 153 unique outcome definitions), and physical activity (n = 32 trials with 87 outcomes and 46 unique outcome definitions). Each node represents a given outcome definition characterized by its domain, measurement method, metric, aggregation method, and time frame. The size of nodes represents the number of times each outcome definition was used in the included trials. Outcome definitions are clustered by outcome domains