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Table 3 Performances of admission myoglobin and CK to predict severe rhabdomyolysis

From: Admission serum myoglobin and the development of acute kidney injury after major trauma

Performance parameter

Prediction of severe rhabdomyolysis defined by a maximum myoglobin > 5000 μg/L

Prediction of severe rhabdomyolysis defined by a maximum CK > 5000 U/L

Admission myoglobin

Admission CK

Admission myoglobin

Admission CK

AUC-ROC

0.94 (0.91–0.97)*

0.88 (0.84–0.91)*

0.91 (0.88–0.94)#

0.88 (0.85–0.91)#

Optimal cutoff

1938

850

1193

686

Sensitivity

84 (74–91)

83 (72–90)

85 (77–90)

88 (81–93)

Specificity

90 (88–92)

80 (77–83)

84 (81–87)

75 (72–78)

PPV

41 (33–49)

25 (20–32)

45 (39–52)

35 (30–41)

NPV

99 (97–99)

98 (97–99)

97 (96–98)

98 (96–99)

PLR

8.5 (6.7–10.7)

4.2 (3.5–5.0)

5.4 (4.5–6.5)

3.6 (3.1–4.1)

NLR

0.2 (0.1–0.3)

0.2 (0.1–0.4)

0.2 (0.1–0.3)

0.2 (0.1–0.3)

  1. Severe rhabdomyolysis was defined either by myoglobin > 5000 μg/L or CK > 5000 U/L. Performance parameters are given with their 95% confidence interval
  2. AUC–ROC area under the receiver operating characteristic curve, NLR negative likelihood ratio, NPV negative predictive value, PLR positive likelihood ratio, PPV positive predictive value
  3. *p < 0.001, #p = 0.013 for comparison between AUC–ROC of admission myoglobin and that of admission CK