Table 2.

Definitions and descriptive statistics for quality measures

Quality Measures	Measure definition	Exclusion criteria	N (%)
No use of serial compression devices in first 2 days	No charges for serial compression devices in the 2 calendar days following surgery	None	62231 (77%)
No statins in first 2 days after surgery	No charge for ‘statin’ lipid lowering drug in 2 calendar days following surgery (e.g. lovastatin, pravastatin, atorvastatin, etc.)	Principal or secondary diagnosis code for liver disease, cirrhosis, myopathy.	45579 (56%)
Inappropriate choice of prophylactic antimicrobials	Use of antimicrobial not on approved list	Principal or secondary diagnosis code for preexisting infection, as defined by Surgical Care Improvement Project (SCIP)	29486 (36%)
No prophylactic antibiotics	No charges for antimicrobials on approved list	Principal or secondary diagnosis code for preexisting infection, as defined by Surgical Care Improvement Project (SCIP)	5167 (6%)
No aspirin in first 2 days after surgery	No charge for aspirin in 2 days after surgery	Principal or secondary diagnosis code for cerebrovascular hemorrhage, gastrointestinal bleeding, factor deficiencies, platelet disorders.	28183 (35%)
No beta-blockers in first 2 days after surgery	No charges for adrenergic blocking agents in 2 days after surgery	Principal or secondary diagnosis code for conduction system disorder, hypotension, sepsis, congestive heart failure, or bradycardia.	15998 (20%)