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

Table 5 Acute kidney injury staging according to MDRD computed creatinine compared to preadmission creatinine

		Preadmission serum creatinine
		No AKI	1	2	3	Total
MDRD Scr	No AKI	356	7	2	0	365
	1	15	47	7	1	70
	2	2	10	10	4	26
	3	0	10	3	24	37
	Total	373	74	22	29	498

MDRD: Modification of Diet in Renal Disease
Kappa 0.711 (95% CI 0.650-0.771)
Misclassification rate was 12.2% (overestimation 8.0% and underestimation 4.2%) – McNemar p = 0.05
p < 0.01 represented significant difference, with the Bonferroni correction

ISSN: 1471-2369