Table 6.

Analysis of risk factors affecting length of hospital stay in patients with ECOPD.

	Univariable		Multivariable-Model 1		Multivariable-Model 2
	IRR (95%CI)	P	IRR (95%CI)	P	IRR (95%CI)	P
Age	1.009 (1.004, 1.013)	<0.001	1.007 (1.002, 1.012)	0.005	1.008 (1.003, 1.013)	0.001
Gender	0.989 (0.878, 1.113)	0.851
EOS ≥ 2%	0.879 (0.794, 0.973)	0.013	0.898 (0.810, 0.995)	0.041	0.910 (0.817, 1.013)	0.083
White blood cell count	1.018 (1.006, 1.031)	0.004			1.011 (0.999, 1.023)	0.083
Procalcitonin	0.999 (0.993, 1.004)	0.581
NT-proBNP	1.000 (1.000, 1.000)	<0.001			1.000 (1.000, 1.000)	<0.001
Hypertension	1.090 (0.995, 1.194)	0.064
Diabetes	0.926 (0.829, 1.035)	0.177
Heart failure	1.295 (1.129, 1.485)	<0.001	1.240 (1.081, 1.422)	0.002
Coronary heart disease	1.023 (0.914, 1.144)	0.697