Thomas 2007.

Study characteristics
Methods	Use of a registry‐generated audit, feedback, and patient reminder intervention in an internal medicine resident clinic‐‐a randomized trial Cluster‐RCT (78 clusters with 78 providers), conducted in a resident continuity clinic, USA Two arms: 1. Control (control arm) and 2. Intervention (intervention arm)
Participants	Control arm N: 231 Intervention arm N: 252 Diabetes type: unclear/not reported Mean age: NR ± NR % Male: NR Longest follow‐up: 10 months
Interventions	Control arm: 1) Clinician education Intervention arm: 1) Audit and feedback 2) Electronic patient registry 3) Clinician education 4) Patient reminders
Outcomes	1) HbA1c 2) SBP 3) DBP 4) LDL
Funding source	This study was funded by an Education Innovation Award, provided by the Mayo Clinic College of Medicine. The sponsor had no role in the design and conduct of the study; collection, management, analysis and interpretation of the data; or preparation, review or approval of the manuscript. The primary author had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Notes	—
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Information not available.
Allocation concealment (selection bias)	Low risk	Cluster‐RCT.
Provider's baseline characteristics (selection bias)	Unclear risk	Resident demographic data (age, sex and year in training) were similar between groups. But no more information or table.
Patient's baseline characteristics (selection bias)	High risk	Not reported.
Patient's baseline outcomes (selection bias)	Low risk	At baseline, there were no significant differences in HgbA1c, LDL cholesterol, blood pressure levels, or adherence to HgbA1c or LDL cholesterol monitoring guidelines between patients cared for by residents in intervention and control groups.
Incomplete outcome data (attrition bias)	Low risk	Information not available.
Blinding of participants and personnel (performance bias) and of outcome assessors (detection bias)	Low risk	Information not available.
Selective reporting (reporting bias)	Low risk	Information not available.
Risk of contamination (other bias)	Low risk	Information not available.
Other bias	Low risk	Information not available.