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Table 4 Sensitivity and specificity of 95th centile values of structural biomarker values from healthy volunteers in detecting functional-AKI

From: Nephrotoxicity-induced proteinuria increases biomarker diagnostic thresholds in acute kidney injury

 

Patients with albuminuria (n = 34)

No-albuminuria (n = 16)

Biomarkers

(ng/mg Cr)

Sensitivitya

Specificitya

Positive likelihood ratioa

Negative likelihood ratioa

Diagnostic odds ratioa

Sensitivitya

Specificitya

Positive likelihood ratioa

Negative likelihood ratioa

Diagnostic odds ratioa

uCysC

96 (79–99)

27 (10–56)

1.3 (0.9–1.9)

0.16 (0–1.4)

8.2 (0.7–91.2)

0 (0–56)

100 (75–100)

0

1 (1–1)

0

uClu

91 (73–98)

54 (28–79)

2 (1–3.4)

0.2 (0–0.7)

12.6 (1.9–82)

0 (0–56)

100 (75–100)

0

1 (1–1)

0

Uβ2M

91 (73–98)

27 (9–56)

1.2 (0.8–1.8)

0.3 (0–1.6)

3.9 (0.5–28)

100 (43–100)

66 (39–86)

3 (1.3–6.7)

0

0

uNGAL

48 (29–57)

91 (62–98)

5.3 (0.8–35.8)

0.6 (0.4–0.9)

9.2 (1–83)

33 (6–79)

92 (64 (98)

4 (0.3–47)

0.7

(0.3–16)

5.5

(0.2–129)

uKIM-1

60 (40–78)

63 (35–85)

1.7 (0.7–3.9)

0.6 (0.3–1.2)

2.7 (0.6–12)

0 (0–56)

1 (75–100)

0

1 (1–1)

0

  1. a Data presented with 95% CI
  2. Serum creatinine ≥ 100% (AKI ≥ 2) is defined as functional-AKI while biomarker concentration >95th centile value in healthy volunteers (uCysC: 70 ng/mg Cr; uClu: 420 ng/mg Cr; uKIM-1 1.2 ng/mg Cr; uβ2M 166 ng/mg Cr and uNGAL: 120 ng/mg Cr) were used to define structural-AKI