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. 2014 Oct 20;9(10):e110527. doi: 10.1371/journal.pone.0110527

Figure 6. Urinary levels of NGAL in AKI and AKI-free patients.

Figure 6

The cut-off values of urinary NGAL at postoperative day 1 (A, dotted line: 12.8 ng/mg creatinine) and postoperative day 7 (B, dotted line: 62.6 ng/mg creatinine) were evaluated using ROC curve analysis. Although the urinary level of NGAL in the AKI group was similar to that of the AKI-free group at postoperative day 1 (A), that at postoperative day 7 was markedly higher in the AKI group than in the AKI-free group (B). The probability of AKI developing between postoperative days 1 and 7 (C) and between postoperative days 8 and 14 (D) was examined using Kaplan-Meier analysis and a log-rank test. Statistical analysis was performed using the Mann-Whitney U test. **P<0.01. NGAL, neutrophil gelatinase-associated lipocalin.