. Author manuscript; available in PMC: 2021 May 10.

Published in final edited form as: Nephron Clin Pract. 2014 Oct 24;128(1-2):29–38. doi: 10.1159/000357675

Table 4. Comparison of early AKI diagnosis and patient outcome using AKIN and RIFLE criteria.

	No AKI (n = 3,985)		AKIN 1a/RIFLE negative (n = 279)		AKIN 1b/RIFLE-’Risk’ (n = 176)
	mean ± SD/count	column, %	mean ± SD/count	column, %	mean ± SD/count	column, %
Age, years	66.6 ± 11.0		68.6 ± 10.6^a		68.2 ± 11.7
Pre-operative creatinine, pmol/l	94.5 ± 31.5		127.1 ± 79.8^b		105.9 ± 44.4^b
Peak percentage creatinine rise	−4.2 ± 18.7%		34.1 ± 8.9%^b		65.7 ± 13.3%^b
Median length of stay, days	7 (IQR 4)		9 (IQR 8)^a		9 (IQR 8)^a
Died as inpatient	87	2.2	17^a	6.1	17^a	9.7

Patients with peak creatinine rises <100% above pre-operative baseline were classified into groups stratified by positivity by both RIFLE-’Risk’ and AKIN stage 1 criteria (peak creatinine ≥50% above baseline), or those positive only by the extended AKIN criteria (increase in serum creatinine of 26.5 μmol/l, referred to as AKIN ‘1a’). Significant differences between groups on χ² testing or comparison of column means are highlighted by superscript.

p < 0.05 vs. no AKI

p < 0.05 vs. all groups.