Volume 53 | Number 4 | August 2018

Abstract List

Bing Ying Poon B.A., Stephen Shortell M.B.A., M.P.H., Ph.D., Hector P. Rodriguez Ph.D., M.P.H.


To examine the extent to which physician‐to‐system ownership transitions are associated with declines in practice‐reported patient responsiveness ().

Data Sources

A longitudinal cohort of practices ( = 897) from the National Survey of Large Physician Organizations/National Survey of Small‐ and Medium‐Sized Physician Organizations (2006/08) and the National Survey of All‐Size Physician Organizations (2012/13).

Study Design

Multivariable regression estimated the effect of ownership on changes in , controlling for practice size, specialty composition, other practice, and market characteristics.

Data Collection/Extraction Methods

Data were collected from three nationally representative surveys of physician organizations consisting of 40‐minute interviews with the medical director, president, or chief executive officer.

Principal Findings

Nine percent of organizations transitioned to system ownership. Compared to practices that were continuously physician‐owned, practices that switched to system ownership did not have significantly lower at baseline but continuously system‐owned practices did. Transitions to system ownership were associated with increased compared to continuously physician ownership. Increased practice size and changes in specialty composition, however, were associated with diminished .


Practices can maintain or improve strategies to address patient concerns when transferring ownership to systems with careful attention to the impact of increased size and changes in specialty composition.