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Table 1 Optimum cut-off value of continuous variables detected by the ROC cutve analysis

From: Are postoperative NLR and PLR associated with the magnitude of surgery-related trauma in young and middle-aged patients with bicondylar tibial plateau fractures? A retrospective study

Variables

Cut-off value

Area under the ROC curve (AUC)

95 % CI

P-value

Preoperative stay (days)

9.0

0.54

0.44–0.63

0.468

Length of incision (cm)

19.0

0.85

0.78–0.91

< 0.001

Operative time (min)

130.0

0.85

0.79–0.92

< 0.001

Preoperative NLR

5.9

0.55

0.45–0.65

0.338

Preoperative PLR

137.5

0.58

0.48–0.67

0.129

Preoperative HCRP

16.1

0.47

0.37–0.56

0.480

Postoperative 1st day NLR

10.1

0.58

0.49–0.68

0.095

Postoperative 1st day PLR

223.9

0.68

0.59–0.77

< 0.001

Postoperative 1st day HCRP

47.6

0.56

0.51–0.70

0.225

  1. Note: P value < 0.05 was considered statistically significant. Abbreviations: ROC, receiver operating characteristic; AUC, areas under the curve; CI, confidence interval; NLR, neutrophil-to-lymphocyte ratio; PLR, platelet-to-lymphocyte ratio; HCRP, hypersensitive C-reactive protein