FIG. 1.

Average Case Mix Index (CMI) by Year (1996–2009). (A) All hospitals in the state of California reported to the Office of State Health Planning and Development database. (B) Hospitals separated by financial status as public, private, and nonprofit. *P<0.01 vs. baseline variation from 1996–2004 for all hospitals, private for-profit hospitals, and private nonprofit hospitals. **P<0.01 vs. baseline variation from 1996–2008 for public hospitals. MS-DRG, Medicare Severity Diagnosis Related Group.