patient time costs associated with sensoraugmented insulin pump therapy for type 1 diabetes results from the star 3 randomized trial background sensoraugmented pump therapy sapt leads to lower glycated hemoglobin levels than multiple daily injections of insulin mdi in patients with type 1 diabetes patient time and costs associated with sapt are not knownobjective we compared time spent on diabetesrelated care changes in time and associated patient time costs between patients randomly assigned to sapt or mdi design setting and participants during a 52week clinical trial participants aged 7 to 70 years n 483 reported total time per week spent on diabetesrelated caremeasurements patient time including comparisons during pump initiation 52week patient time costs and changes in weekly time estimates after pump initiationresults at baseline patients in the mdi group reported spending an average of 40 hours per week on diabetesrelated care during the pump initiation period weeks 17 sapt patients spent 19 hours more per week than mdi patients 95 confidence interval ci 1226 after the initiation period weeks 852 sapt patients spent 1 hour more per week 95 ci 0417 than mdi patients ie 44 v 34 hours patients in both groups spent progressively less time on diabetesrelated care by 12 minutes per week 95 ci 17 to 07 overall mean time costs per person were 4600 with the sapt group and 3523 with the mdi group difference 1077 95 ci 4911638limitations time spent on specific activities was not collected and the estimates do not explicitly account for caregiver time associated with diabetes care activitiesconclusions patients receiving sapt v mdi spent approximately 2 hours more per week on diabetesrelated care during pump initiation and 1 hour more per week thereafter resulting in higher patient time costs