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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