Diagnosis and outcomes of acute kidney injury using surrogate and imputation methods for missing preadmission creatinine values

Table 6 Acute kidney injury staging according to CKD-EPI computed creatinine compared to preadmission creatinine

		Preadmission serum creatinine
		No AKI	1	2	3	Total
CKD-EPI Scr	No AKI	355	7	1	0	363
	1	16	46	8	1	71
	2	2	11	8	4	25
	3	0	10	5	24	39
	Total	373	74	22	29	498

CKD-EPI: Chronic Kidney Disease Epidemiology Collaboration
Kappa 0.694 (95% CI 0.633-0.755)
Misclassification rate was 13.1% (overestimation 8.8% and underestimation 4.2%) – McNemar p = 0.04
p < 0.01 represented significant difference, with the Bonferroni correction

ISSN: 1471-2369