Methods
This was a retrospective chart analysis conducted at 2 academic primary care clinics in Hamilton, Ont, with a total of 33 staff physicians (with rotating McMaster University family medicine residents) working in a capitated payment model with 27 300 registered patients.
Clinics used the open-source Oscar EMR system, whichis used by 1500 clinicians in the care of 2 million patients across Canada (http://oscarcanada.org).17 The study was approved by research ethics boards at McMaster University and St Michael’s Hospital in Toronto, Ont. We retrieved charts of relevant patients aged 16 years and older, registered under any of 14 consenting physicians.