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Table 2 AUC, PPV, NPV, sensitivity and specificity for PMN elastae in patients with myositis

From: Correlation of PMN elastase and PMN elastase-to-neutrophil ratio with disease activity in patients with myositis

 IIMsDMPM
PMN elastaseCKENRPMN elastaseCKENRPMN elastaseCKENR
AUC
(95% CI)
0.90***
(0.83–0.97)
0.72**
(0.61–0.84)
0.96***
(0.92–1.0)
0.90***
(0.82–0.98)
0.70*
(0.57–0.83)
0.96***
(0.91–1.0)
0.88*
(0.65–1.0)
0.80*
(0.56–1.0)
1.0**
(1.0–1.0)
Cut off value
(ng/mL)
1632.484.8329.01632.4107.9329.01632.4107.9329.0
PPV10.890.98110.98111
NPV0.770.590.850.680.440.890.780.581
Sensitivity (%)7956888042.994804394
Specificity (%)10090971001009610010096
  1. AUC area under the curve, PPV positive predictive value, NPV negative predictive value; 95% CI 95% confidence interval, ENR PMN elastase-to-netrophil ratio
  2. * P < 0.05 for the area under the curve; **P < 0.01 for the area under the curve; ***P < 0.001 for the area under the curve