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. 2020 Oct 26;10:18261. doi: 10.1038/s41598-020-75234-y

Figure 4.

Figure 4

Determination of the cut-off level for the extent of contraction as well as accuracy and significance of the clot contraction assay for predicting postoperative DVT. (A) Optimal cut-off level determined by a chi-square test (p value on the Y-axis) for the differences in the number of patients without and with postoperative DVT with the extent of clot contraction below or above various cut-off levels (shown on the X-axis). (B) ROC curves and AUC values for the extent of clot contraction before surgery, 1st day and 5–7th days after surgery.