Abstract
Background
The Centers for Medicare and Medicaid Services (CMS) developed risk-adjusted “Star Ratings”, which serve as a guide for patients to compare hospital quality (1-star = lowest to 5-star = highest). Although star ratings are not based on surgical care, for many procedures, surgical outcomes are concordant with star ratings. In an effort to address variability in hospital mortality after complex cancer surgery, the use of CMS Star Ratings to identify the safest hospitals was evaluated.
Methods
Patients >65 years of age who underwent complex cancer surgery (lobectomy, colectomy, gastrectomy, esophagectomy, pancreaticoduodenectomy) were evaluated in CMS MEDPAR files (2013-2016). The impact of reassignment was modeled by applying adjusted mortality rates of patients treated at 5-star hospitals to those at 1-star hospitals (Peters-Belson method).
Results
105,823 patients underwent surgery at 3,146 hospitals. 90-day mortality decreased with increasing star rating (1-star = 10.4% [95% CI (9.8-11.1%)] to 5-star = 6.4% [95% CI (6.0 – 6.8%)]). Reassignment of patients from 1-star to 5-star hospitals (7.8% of patients) was predicted to save 84 Medicare beneficiaries each year. This impact varied by procedure (colectomy: 47 lives/year to gastrectomy: 5 lives/year). Overall, 2,189 patients would have to change hospitals each year to improve outcomes (26 patients moved to save one life).
Conclusion
Mortality after complex cancer surgery is associated with CMS Star Rating. However, the use of CMS Star Ratings by patients to identify the safest hospitals for cancer surgery would be relatively inefficient and of only modest impact.