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. 2014 Dec 26;9(12):e114369. doi: 10.1371/journal.pone.0114369

Table 4. Concordance of AKI designation.

Definition	Comparison	No AKI by RIFLE or AKIN	AKI stage by RIFLE or AKIN
			Risk/Stage 1	Injury/Stage 2	Failure/Stage 3
KDIGO	RIFLE
NO AKI		614(61.1%)	0	0	0
Stage 1		61(6.1%)^a	133(13.2%)	0	0
Stage 2		0^a	0	104(10.3%)	0
Stage 3		7(0.7%)^a	8(0.8%)	12(1.2%)	66(6.6%)
KDIGO	AKIN
NO AKI		614(61.1%)	0	0	0
Stage 1		37(3.7%)^b	157(15.6%)	0	0
Stage 2		3(0.3%)^b	0	101(10.0%)	0
Stage 3		2(0.2%)^b	0	0	91(9.1%)

AKI: acute kidney injury;

^a

: K(+)R(−), AKI diagnosed by KDIGO criteria but not by RIFLE criteria.

^b

: K(+)A(−), AKI diagnosed by KDIGO criteria but not by AKIN criteria.