Comparing routine administrative data with registry data for assessing quality of hospital care in patients with myocardial infarction using deterministic record linkage

Table 1 Comparison of documentation of baseline characteristics of matched cases, with measurement of agreement

Comparison for matched patients	AOK (n = 2305)	BMIR (n = 2305)	Kappa coefficient	Classification according to categories
Age (mean)	69 yrs.		-
Women	35 %		-
Treatment in hospital with cath lab	96.5 %	96.6 %	0.902	I
STEMI	47.5 %	46.9 %	0.835	I
Diabetes	30.3 %	33.2 %	0.819	I
Hypertension	67.8 %	79.9 %	0.417	IIa
Smoking	14.8 %	39.9 %	0.390	IIa
Hypercholesterolemia	41.8 %	49.5 %	0.341	IIa
Previous stroke	0.9 %	9.7 %	0.103	IIb
Previous MI	3.2 %	24.8 %	0.007	IIb
Previous PCI	1.0 %	25.6 %	0.010	IIb
Atrial fibrillation	15.5 %	11.3 %	0.582	III
CHF	39.3 %	16.7 %	0.209	III
Renal failure	23.8 %	20.8 %	0.618	III
Cardiogenic shock	6.4 %	5.4 %	0.447	III

ISSN: 1472-6963