Table 5.

Identification of Low-Performance Hospitals by “No Date Stamp” Models

Condition	n	Sensitivity	FNER	PPV	FPER
Coronary artery bypass	123	0.60	0.40	0.50	0.50
Coronary angioplasty	162	0.67	0.33	0.67	0.33
Carotid endarterectomy	311	1.00	0	0.50	0.50
Abdominal aortic aneurysm repair	301	0.94	0.06	0.85	0.15
Hip replacement	360	0.60	0.40	0.75	0.25
Acute myocardial infarction	378	0.67	0.33	0.64	0.36
Stroke	389	0.92	0.08	0.88	0.12

n, number of hospitals; FNER, false-negative error rate (proportion of low-performance hospitals “missed” by the “no date stamp” models); PPV, positive predictive value; FPER, false-positive error rate (proportion of hospitals misclassified as low-quality hospitals by “no date stamp” model).