Cleveringa 2008.

Study characteristics
Methods	Combined task delegation, computerized decision support, and feedback improve cardiovascular risk for type 2 diabetic patients: a cluster randomized trial in primary care Cluster‐RCT (55 clusters), conducted in primary care practices throughout The Netherlands Two arms: 1) Control (control arm) and 2) Intervention (intervention arm)
Participants	Control arm N: 1692 Intervention arm N: 1699 Diabetes type: type 2 Mean age: 65.1 ± 11.2 % Male: 49.0 Longest follow‐up: 12 months
Interventions	Control arm: None Intervention arm: 1) Audit and feedback 2) Case management 3) Clinician reminders 4) Patient reminders
Outcomes	1) HbA1c 2) SBP 3) DBP 4) LDL 5) Smoking cessation
Funding source	For this study we received an unrestricted grant from Pfizer B.V.
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)	High risk	Not reported
Patient's baseline characteristics (selection bias)	High risk	Data is provided for age and gender in the Table 1 and the authors mention no differences between the groups, but no data on education. Significant difference in smoking and history of cardiac diseases.
Patient's baseline outcomes (selection bias)	Low risk	HDL cholesterol levels in Table 1 seem fine (1.36 vs 1.32).
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	Unclear risk	Information not available.