The predictive value of early acute kidney injury for long-term survival and quality of life of critically ill patients

Table 4 Poisson regression model for poor outcome

Model		Beta	Relative risk	RR 95 % CI	P value
Intercept		−2.401			<0.001
eAKI	No eAKI	Reference
	Risk	0.023	1.02	0.91, 1.15	0.691
	Injury	0.133	1.14	1.01, 1.29	0.034
	Failure	0.223	1.25	1.01, 1.55	0.042
Sex	Male	Reference
Sex	Female	0.096	1.10	1.01, 1.2	0.030
Admission type	Elective surgical	Reference
	Urgent surgical	0.185	1.20	0.99, 1.45	0.057
	Medical	0.270	1.31	1.09, 1.57	0.004
Mechanical ventilation within 24 hours of ICU admission	No	Reference
Mechanical ventilation within 24 hours of ICU admission	Yes	0.086	1.09	0.93, 1.28	0.300
Confirmed infection within 24 hours of ICU admission	No	Reference
Confirmed infection within 24 hours of ICU admission	Yes	0.116	1.12	1.02, 1.24	0.017
Age (transformed)		1.615	5.03	3.63, 6.96	<0.001
Charlson Comorbidity Index		0.050	1.05	1.03, 1.07	<0.001
Pre-ICU hospital length of stay		0.005	1.01	1.00, 1.01	0.050
Acute Physiology Score (transformed)		0.324	1.38	1.26, 1.52	<0.001

Results were pooled from 35 imputation datasets, using Rubin’s rule. Age was transformed into ((age-16)/100)^2, Acute Physiology Score (APS) was transformed into ((APS-1)/10)^-1 + ((APS-1)/10). RR 95 % CI 95 % confidence interval of the relative risk, eAKI early acute kidney injury, ICU intensive care unit

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