Table 4.

Analyses of the NUF rate and hospital mortality.

NUF rate (ml/kg/h)	Univariable models		Multivariable models
	Odd ratio (95% CI)	P-value	Odd ratio (95% CI)	P-value
<1.6 ml/kg/h	1.69 (1.17-2.45)	0.006	1.46 (0.97-2.19)	0.070
1.6–3.1 ml/kg/h	1 (reference)	N/A	1 (reference)	N/A
>3.1 ml/kg/h	1.17 (0.88-1.57)	0.279	1.45 (1.04-2.03)	0.030

Adjusted by age, gender, body mass index, ICU type, baseline serum creatinine, Charlson Comorbidity Index Score, Oxford Acute Severity of Illness Score on the first day of admission, sepsis on the first day of admission, need for mechanical ventilation on the first day of admission, time from ICU admission until start of CKRT in minutes, mean arterial pressure before CKRT, Vasoactive-inotropic Score before CKRT, sequential organ failure assessment score before CKRT, fluid overload percent before CKRT and cumulative fluid overload percent in the first 48 h of CKRT.