Table 3 Performance of different VAT and waist optimal thresholds to detect two components of the metabolic syndrome (excluding waist circumference)

VAT area

 174.0 (137.7–181.5)

Youden index

47.3 (40.3–54.4)

40.9 (34.0–48.0)

0.723 (0.614–0.815)

0.700 (0.610–0.780)

0.709 (0.642–0.770)

6.02 (3.28–11.31)

2.36 (1.68–4.48)

0.423 (0.223–0.596)

0.625 (0.520–0.722)

0.785 (0.695–0.859)

2.41 (1.78–3.27)

0.40 (0.27–0.57)

 175.50 (154.6–180.1)

CTL

47.8 (40.7–54.9)

40.9 (34.0–48.0)

0.735 (0.627–0.826)

0.700 (0.610–0.780)

0.714 (0.647–0.775)

6.47 (3.46–12.08)

2.30 (1.65–4.23)

0.435 (0.236–0.606)

0.629 (0.525–0.725)

0.792 (0.703–0.865)

2.45 (1.81–3.31)

0.38 (0.26–0.55)

WC

 94.40 (89.7–102.3)

36.4 (29.8–43.5)

40.9 (34.0–48.0)

0.614 (0.501–0.719)

0.808 (0.726–0.874)

0.729 (0.662–0.789)

6.72 (3.56–12.67)

2.36 (1.68–4.39)

0.423 (0.228–0.594)

0.689 (0.571–0.792)

0.752 (0.668–0.824)

3.21 (2.14–4.81)

0.48 (0.36–0.63)

 94.40 (93.3–101.2)

CTL

36.4 (29.8–43.5)

40.9 (34.0–48.0)

0.614 (0.501–0.719)

0.808 (0.726–0.874)

0.729 (0.662–0.789)

6.72 (3.56–12.67)

2.36 (1.68–4.39)

0.423 (0.228–0.594)

0.689 (0.571–0.792)

0.752 (0.668–0.824)

3.21 (2.14–4.81)

0.48 (0.36–0.63)

 80^b

10.8 (6.9–15.9)

40.9 (34.0–48.0)

0.205 (0.124–0.307)

0.958 (0.905––0.986)

0.650 (0.580–0.716)

6.13 (3.40–33.87)

0.163 (0.029–0.294)

0.773 (0.546–0.922)

0.635 (0.561–0.705)

4.92 (1.89–12.80)

0.83 (0.74–0.93)

 90^b

26.1 (20.2–32.7)

40.9 (34.0–48.0)

0.482 (0.371–0.594)

0.892 (0.822–0.941)

0.724 (0.657–0.784)

7.66 (3.73–15.71)

2.68 (1.87–5.19)

0.374 (0.193–0.535)

0.755 (0.617–0.862)

0.713 (0.634–0.784)

4.45 (2.54–7.78)

0.58 (0.47–0.72)