The Effect of Long-Term Duration Renal Replacement Therapy on Outcomes of Critically Ill Patients with Acute Kidney Injury: A Retrospective Cohort Study

Table 6

The effect of the duration of RRT on mortality analyzed by Cox proportional hazards regression models.

Outcome	Unadjusted			Adjusted
	HR	95% CI	value	HR	95% CI	value
28-day mortality
Duration of RRT	0.996	0.994–0.998	<0.001	0.995	0.993–0.997	<0.001
60-day mortality
Duration of RRT	0.999	0.998–1	0.055	0.999	0.998–1	0.052
90-day mortality
Duration of RRT	0.999	0.999–1	0.207	0.999	0.998–1	0.06

RRT = renal replacement therapy. Unadjusted: single-factor analysis of the effect of duration of RRT on mortality by Cox proportional hazards regression models. Adjusted: adjusted by variables selected from the univariate analysis ( value less than 0.1).