Evaluating Structured Care for Diabetes: Can Calibration on Margins Help to Avoid Overestimation of the Benefits? An Illustration From French Diabetes Provider Networks Using Data From the ENTRED Survey

While there is growing evidence on the effectiveness of structured care for diabetic patients in trial settings, standard population level evaluations may misestimate intervention benefits due to patient selection. In order to account for potential biases in measuring intervention benefits, we tested the impact of calibration on margins as a novel adjustment method in an evaluation context compared with simple poststratification.