Mazzuca 1990.

Methods	RCT (nonequivalent control group design, randomised by clinic area) Randomisation concealment: DONE Follow up: ‐ providers: DONE ‐ patients: N/A Blinded assessment: DONE Baseline: NOT CLEAR Reliable outcomes: DONE Protection against contamination: DONE no unit of analysis error
Participants	A general medicine clinic, Indianapolis (US). 99 internal medicine residents and 15 faculty internists, 98 were included (Type 2 diabetes). providers ‐ 98 patients ‐ 2791 encounters ‐ 8132 practices ‐ 1 clinic
Interventions	Intervention group: Professional intervention (distribution of educational materials + educational meetings, reminders + audit and feedback) + patient education Control group: only received a postgraduate seminar Length of intervention: 11 months
Outcomes	PROCESS: GHb Fasting blood sugar Home‐monitored blood glucose Diet Oral hypoglycaemic agents PATIENT: NONE
Notes	National guidelines (ADA‐guidelines) ‐directed at monitoring and treatment ‐targets: adherence to five key program recommendations (see process outcomes)
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	A ‐ Adequate