Table 5.

Multivariable cox regression analysis of associated factors with mortality

Variables	OR	95%CI	P value
Model 1
Age (years)	1.017	0.968-1.067	0.511
Frailty score	1.869	1.118-3.123	0.017*
Ultrafiltration volume/dry weight	5.340	0.015-15.231	0.827
Hb (g/l)	0.990	0.955-1.026	0.578
CAD	4.014	0.514-33.072	0.182
Model 2
Age(years)	1.015	0.971-1.061	0.169
Non-frail	ref	ref	0.014*
Pre-frail	0.000	0.000-	0.984
Frail	0.199	0.068-0.585	0.003*
Ultrafiltration volume /dry weight	1.080	0.025-4.833	0.769
Hb(g/l)	0.996	0.936-1.002	0.936
CAD	0.472	0.000-7.458	0.159

Abbreviations: Hb, hemoglobin; CAD, coronary artery disease; OR, odds ratio; 95%CI, 95% confidential interval.

Notes: Non-frail (score 0)is used as reference and is set as 0, Pre-frail (score 1-2)is set as 1, Frail (score≥3) is set as 2. Death is set as 1, survival is set as 0

* P<0.05