Sequist 2009.

Study characteristics
Methods	Cluster RCT
Participants	Primary care practices affiliated with academic medical center, USA (Harvard Vanguard Medical Associates) 21 860 patients, 110 physicians, 11 sites
Interventions	Reminder during office visits for patients overdue for colorectal cancer screening
Outcomes	Process adherence (testing, other)
Co‐Interventions	Educational: Single educational session for providers in intervention group Beyond Clinician Education: None
CDSS Features ‐ Acknowledgement of CDSS Required	Yes ‐ required acknowledgement of the CDSS but not documentation of action taken
CDSS Features ‐ Other	Ambush, interruptive, makes care recommendation, possible to execute desired action, 'push' mode of delivery, targeted underuse
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Low risk	N/A
Incomplete outcome data (attrition bias) All outcomes	Low risk
Baseline characteristics similar?	Low risk
Unit of analysis error	Low risk	N/A