Table 7.

Urinary L-FABP levels predictive of AKI in the open-repair study

Time point	Cutoff value (μg/g Cr)	Sensitivity	Specificity	PPV	NPV
Preoperation	12.7	0.25	0.81	0.12	0.91
After anesthesia induction	9.9	0.42	0.69	0.12	0.92
Pre-AXC	5.6	0.83	0.42	0.13	0.96
1 h post-AXC	37.2	0.50	0.79	0.20	0.94
2 h post-AXC	173.0	0.67	0.83	0.30	0.96
Postoperation	32.3	0.92	0.54	0.17	0.98
4 h postoperation	348.5	0.50	0.92	0.40	0.95
POD1	112.1	0.62	0.83	0.28	0.95
POD2	48.6	0.54	0.83	0.25	0.95
POD3	19.5	0.85	0.61	0.19	0.97

L-FABP liver-type fatty-acid-binding protein, AKI acute kidney injury, AXC aorta cross-clamping, PPV positive predictive value, NPV negative predictive value, POD postoperative day, Cr creatinine