. Author manuscript; available in PMC: 2010 Dec 20.

Published in final edited form as: Health Aff (Millwood). 2009 Mar–Apr;28(2):526–532. doi: 10.1377/hlthaff.28.2.526

EXHIBIT 2.

Ceiling Effects In Performance Measures, CMS/Premier Hospital Quality Initiative Demonstration (HQID) Segment For Hip And Knee Replacement

Measure	Hospitals at 99% or above
Metabolic complication avoidance index^a	101/101 (100%)
Hematoma avoidance index^a	107/107 (100%)
Readmission avoidance index^a	81/107 (81%)

Antibiotics administered within 1 hour before incision	1/212 (0.5%)
Antibiotics discontinued within 24 hours of surgery	4/212 (1.9%)
Antibiotic selection appropriate^a	3/107 (2.8%)

SOURE: Authors’ analysis; see methods section in text.

NOTE: CMS is Centers for Medicare and Medicaid Services.

Data from these variables are available for top 50 percent performing hospitals only.