Table 3.

Relationship between KDIGO stage and risk categories of the Cleveland tool

	No AKI (N = 1980)	KDIGO stage 1 (N = 142)	KDIGO stage 2 (N = 60)	KDIGO stage 3 (N = 134)
Overall mean (SD) risk score	1.61 (1.59)	2.34* (1.68)	2.35* (1.66)	3.69*,& (2.07)
Cleveland risk category	N (%)	N (%)	N (%)	N (%)
Low risk (0–2; n = 1659)	1503 (90.6%)	82 (4.9%)	32 (1.9%)	42 (2.5%)
Intermediate risk (3–5; n = 576)	429 (74.4%)	55 (9.5%)	25 (4.3%)	68 (11.8%)
High risk (6–8; n = 75)	47 (59.5%)	5 (6.3%)	3 (3.8%)	24 (30.4%)
Very high risk (≥9; n = 1)	1 (100%)	0	0	0

Abbreviations: AKI acute kidney injury, KDIGO kidney disease: improving global outcomes, SD standard deviation.

^*significantly different from No AKI (p < 0.05, Bonferonni).

&significantly different from Stage 1 (p < 0.05, Bonferonni).