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Table 3 A comparison of the diagnostic performance of a combined model for diagnosing DSSI

From: Assistive diagnostic indicators for infections related to lumbar posterior interbody fusion internal fixation: platelet count and mean platelet volume

 

ESR + CRP

ESR + CRP + P/M ratio

P value

AUC

0.803

0.887

0.032

95%CI

0.700–0.905

0.818–0.956

 

Sensitivity

83.3%

95.4%

 

Specificity

78.0%

67.8%

 

Accuracy

79.52%

75.90%

 

Positive likelihood ratio

3.786

2.963

 

Negative likelihood ratio

0.214

0.068

 

Positive predictive value

60.61%

54.76%

 

Negative predictive value

92.00%

97.56%

 
  1. DSSI deep surgical site infection, ESR erythrocyte sedimentation rate, CRP C-reactive protein, AUC areas under the ROC curves, P/M, platelet count/mean platelet volume