Table 4. Discrimination ability of CV (by ROC curve) to predict AKI (Stage II) in individualized 10 km-split.

	AUC	P value
CV (10th– 20th km)	0.989	0.002
CV (20th– 30th km)	0.932	0.007
CV (30th– 40th km)	0.999	0.002
CV (40th– 50th km)	0.966	0.004
CV (50th– 60th km)	0.943	0.006
CV (60th– 70th km)	0.909	0.011

Definition of abbreviations: AUC = Area under curve.