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Table 4 Summary of ROC analysis results for TWL%

From: Efficacy of ursodeoxycholic acid in reducing the necessity of cholecystectomy due to pre-existing and subsequently formed gallstones in patients who underwent laparoscopic sleeve gastrectomy

TWL% Threshold

Sensitivity (%)

Specificity (%)

Youden’s Index

12.5

94.9

3.4

-1.7

15.0

91.5

8.9

0.4

17.5

76.3

28.8

5.1

20.0

64.4

47.9

12.3

22.5

49.2

67.8

17.0

25.0

37.3

81.4

18.7

27.5

25.4

89.8

15.2

30.0

13.6

96.6

10.2

32.5

5.1

100.0

5.1