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

Table 2 Comparison of documentation of treatment and outcome of matched cases, with measurement of agreement

Comparison for matched patients	AOK (n = 2305)	BMIR (n = 2305)	Kappa coefficient	Classification according to categories
PCI (PCI for pts. coded as STEMI in AOK and BMIR) (PCI for pts. coded as NSTEMI in AOK and BMIR)	82.1 % 94.7 % 71.9 %	82.5 % 94.1 % 72.1 %	0.903 0.885 0.925	I
Hospital mortality	9.2 %	9.2 %	0.979	I
Length of stay in hospital (median IQR)	6 days (4/10)	6 days (4/9)	0.868	I

ISSN: 1472-6963