Abstract
Context
Transitioning primary care physicians from fee-for-service to capitation or blended payments and incorporating team-based care are widely regarded as desirable transformations for patient-centred medical homes, but there are few studies evaluating the effects of these changes.
Objective
To assess the effects of capitation payment and team-based care on chronic disease management and prevention by evaluating a large-scale transition of primary care physicians to medical homes in Ontario.
Design
We conducted a longitudinal population-wide study using routinely collected administrative data. We used Poisson regression models to examine the association between type of medical home and diabetes and cancer screening in 2011. We calculated outcomes for each fiscal year between 2001 and 2011 and used a fitted non-linear model to compare changes in outcomes between type of medical home over time.
Participants
All Ontario patients enrolled to a medical home in 2011 (N = 10 675 480).
Intervention
Patient enrolment in team-based capitation, non-team capitation, or enhanced fee-for-service medical homes as of March 31, 2011.
Main outcome measures
Proportion of eligible patients receiving testing for diabetes and screening for cervical, breast, and colorectal cancer.
Results
Patients in team-based capitation were more likely to receive recommended testing for diabetes in 2011 than were patients in non-team capitation or enhanced fee-for-service (40%, 36%, and 32%, respectively) and this was true even after adjustment for patient and physician characteristics (relative risk [95% CI]) compared with enhanced fee-for-service: team-based capitation 1.22 [1.18 to 1.25]; non-team capitation 1.10 [1.07 to 1.14]). Patients in team-based capitation experienced the greatest improvement in recommended testing for diabetes over time, followed by patients in non-team capitation (absolute difference in improvement [95% CI]) compared with enhanced fee-for-service: team-based capitation 10.6% [7.9% to 13.2%]; non-team capitation 4.1% [1.5% to 6.8%]). Patients in team-based capitation experienced the greatest improvement in cervical cancer screening but there were no significant differences in change over time between medical homes for breast and colorectal cancer.
Conclusion
The shift to capitation payment and the addition of team-based care in Ontario were associated with moderate improvements in diabetes care but the effect on cancer screening was less clear.
