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

Table 3 Acute kidney injury staging according to first creatinine at hospital admission compared to preadmission creatinine

		Preadmission serum creatinine
		No AKI	1	2	3	total
First SCr	No AKI	370	7	4	5	386
	1	3	64	10	1	78
	2	0	3	6	2	11
	3	0	0	2	21	23
	Total	373	74	22	29	498

Kappa 0.811 (95% CI 0.756-0.866)
Misclassification rate was 7.4% (overestimation 1.6% and underestimation 5.8%) - McNemar p = 0.02
p < 0.01 represented significant difference, with the Bonferroni correction

ISSN: 1471-2369