Table 6.

Cox regression analysis for estimation of the survival rate on the 28th day according to the ability to ambulate

	Univariate		Multivariate
	HRb) (95% CIc))	p-value	HRb) (95% CIc))	p-value
Inability to ambulate	2.352 (1.083–5.108)	0.031	N/A	N/A
Respiratory infection	2.274 (1.027–5.033)	0.043	2.077 (0.935–4.613)	0.022
C-reactive protein	1.057 (1.029–1.086)	<0.001	1.061 (1.030–1.093)	<0.001
Albumin	0.468 (0.257–0.851)	0.013	0.542 (0.281–1.042)	0.023
CRPa) to albumin ratio	1.219 (1.119–1.328)	<0.001	1.212 (1.114–1.319)	<0.001

^a)CRP C-reactive protein

^b)HR Hazard ratio

^c)CI Confidence interval