Accuracy of Self‐Report Versus Objective Smart‐Scale Weights During a 12‐Week Weight Management Intervention

Objective Greater frequency of self‐weighing has been associated with greater weight loss in weight management interventions, but little is known regarding the accuracy of self‐reported weight data. Methods Agreement between objective smart‐scale and self‐reported weight data was assessed in 74 adults (age = 50.7 years; BMI = 31.2 kg/m2) enrolled in a 12‐week, Internet‐based weight management program. Participants were asked to self‐weight daily using a study‐provided smart scale and to self‐report weights via the study website. Results There was strong agreement between smart‐scale and self‐reported weight values (intraclass correlation = 0.982) but only moderate agreement regarding frequency of self‐weighing assessed via each method (κ = 0.491; P