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Table 2 Comparison of sensitivity, specificity, youden index of screen-detected T2D (HbA1c ≥ 6.5 %), with different neck circumference point

From: Neck circumference as a risk factor of screen-detected diabetes mellitus: community-based study

Neck circumference, cm

SDDM HbA1c ≥ 6.5 % vs. all other study categories

SDDM HbA1c ≥ 6.5 % vs. NGT

Sensitivity (%)

Specificity (%)

Youden index

Sensitivity (%)

Specificity (%)

Youden index

Women

 ≥29

100.0

0.0

0.00

100.0

0.0

0.00

 >31

100.0

6.2

0.06

100.0

13.2

0.13

 >32

94.4

10.0

0.04

94.4

18.9

0.13

 >33

94.4

18.5

0.13

94.4

26.4

0.21

 >34

88.9

29.2

0.18

88.9

39.6

0.29

 >34.5

88.9

31.5

0.20

88.9

43.4

0.32

 >35

83.3

45.4

0.29

83.3

60.4

0.44

 >36

72.2

61.5

0.34

72.2

77.4

0.50

 >36.5

72.2

62.3

0.35

72.2

79.3

0.51

 >37

50.0

73.1

0.23

50.0

88.7

0.39

 >37.5

50.0

74.6

0.25

50.0

90.6

0.41

 >38

33.3

82.3

0.16

33.3

90.6

0.24

 >38.5

33.3

83.9

0.17

33.3

94.3

0.28

 >39

27.8

90.8

0.19

27.8

96.2

0.24

 >39.5

27.8

91.5

0.19

  

0.00

 >40

22.2

93.9

0.16

22.2

100.0

0.22

 >40.5

16.7

93.9

0.11

 >41

5.6

94.6

0.00

 >42

0.0

97.7

0.98

0.0

100.0

0.00

 >44

0.0

100.0

0.00

Men

 ≥35

100.0

0.0

0.00

100.0

0.0

0.00

 >38.5

100.0

38.5

0.38

100.0

52.6

0.53

 >39

83.3

51.3

0.35

83.3

52.6

0.36

 >40

66.7

66.7

0.33

66.7

68.4

0.35

 >41.5

66.7

71.8

0.38

66.7

79.0

0.46

 >42

50.0

84.6

0.35

50.0

89.5

0.39

 >43

33.3

89.7

0.23

33.3

89.5

0.23

 >44

16.7

100.0

0.17

16.7

100.0

0.17

 >45

0.0

100.0

0.00

0.0

100.0

0.00