Table 5

The association between in-hospital mortality, case management and chest pain centre accreditation status in accredited hospitals*

Endings or treatment procedures	Before accreditation	Undergoing accreditation		After accreditation		Undergoing or after accreditation
Endings or treatment procedures	Before accreditation	OR^a	95% CI	OR^a	95% CI	OR^a	95% CI
ACS
In-hospital death	ref	0.86	(0.79 to 0.93)	0.90	(0.84 to 0.97)	0.89	(0.84 to 0.94)
Length of stay	ref	0.94	(0.93 to 0.95)	0.89	(0.89 to 0.90)	0.91	(0.91 to 0.92)
Total charge	ref	1.00	(0.99 to 1.01)	0.98	(0.97 to 0.99)	0.99	(0.98 to 0.99)
PCI	ref	1.22	(1.18 to 1.26)	1.36	(1.33 to 1.39)	1.31	(1.28 to 1.34)
AMI
In-hospital death	ref	0.84	(0.77 to 0.93)	0.90	(0.83 to 0.97)	0.88	(0.82 to 0.94)
Length of stay, day	ref	0.94	(0.93 to 0.95)	0.88	(0.87 to 0.89)	0.91	(0.90 to 0.91)
Total charge	ref	1.01	(1.00 to 1.02)	0.99	(0.97 to 1.00)	0.99	(0.98 to 1.01)
PCI	ref	1.32	(1.26 to 1.38)	1.49	(1.43 to 1.54)	1.42	(1.37 to 1.47)

*Mixed-effect models were used in the analysis to control for hospital-associated random effects, a logistic regression model was used for the in-hospital death endpoint, a negative binomial model was used for the length-of stay endpoint and a generalised linear model with a log link and γ distribution was used for the charges endpoint. a:Results are presented as odds ratios for death, PCI and as multiplicativeeffect (eg, 2.0 = doubling) for length of stay and charges. Adjusted for sex, age, comorbidities (hypertension, diabetes, heart failure and old myocardial infarction), types and ranks of hospitals and geographical region (for total charge, percutaneous coronary intervention was also adjusted for).
ACS, acute coronary syndrome; AMI, acute myocardial infarction; PCI, percutaneous coronary intervention.