Table 3.
ROC curve analysis of baseline anthropometric indices for predicting future hyperglycaemia
| AUC | SE | P values | 95% CI | Cut-off point | Youden’s value | Sensitivity, % | Specificity, % | DeLong’s test (p values) | ||||
| WHtR (cm/cm) | BMI (kg/m2) | Waist circumference (cm) | WHR (cm/cm) | |||||||||
| Isolated IFG | ||||||||||||
| WHtR (cm/cm) | 0.578 | 0.025 | 0.002 | (0.529 to 0.626) | 0.51 | 0.151 | 54.90 | 60.19 | – | 0.010 | 0.201 | 0.611 |
| BMI (kg/m2) | 0.544 | 0.025 | 0.081 | (0.495 to 0.593) | 21.36 | 0.078 | 80.40 | 27.43 | 0.010 | – | 0.023 | 0.421 |
| Waist circumference (cm) | 0.592 | 0.024 | 0.000 | (0.545 to 0.639) | 77.10 | 0.148 | 71.24 | 43.54 | 0.201 | 0.023 | – | 0.195 |
| Women | 0.584 | 0.031 | 0.010 | (0.524 to 0.644) | 75.00 | 0.166 | 74.44 | 42.11 | – | – | – | – |
| Men | 0.579 | 0.041 | 0.050 | (0.526 to 0.631) | 87.00 | 0.165 | 49.21 | 67.24 | – | – | – | – |
| WHR (cm/cm) | 0.567 | 0.026 | 0.008 | (0.537 to 0.597) | 0.88 | 0.128 | 47.06 | 65.71 | 0.611 | 0.421 | 0.195 | – |
| Women | 0.568 | 0.033 | 0.036 | (0.504 to 0.632) | 0.85 | 0.140 | 57.78 | 56.19 | – | – | – | – |
| Men | 0.525 | 0.042 | 0.534 | (0.471 to 0.578) | 0.90 | 0.095 | 53.97 | 55.52 | – | – | – | – |
| Isolated IGT | ||||||||||||
| WHtR (cm/cm) | 0.634 | 0.017 | 0.000 | (0.600 to 0.667) | 0.51 | 0.214 | 62.24 | 59.12 | – | 0.003 | 0.006 | 0.000 |
| BMI (kg/m2) | 0.591 | 0.018 | 0.000 | (0.556 to 0.627) | 22.68 | 0.155 | 68.88 | 46.64 | 0.003 | – | 0.178 | 0.223 |
| Waist circumference (cm) | 0.610 | 0.017 | 0.000 | (0.576 to 0.645) | 78.00 | 0.197 | 71.90 | 47.81 | 0.006 | 0.178 | – | 0.001 |
| Women | 0.635 | 0.021 | 0.000 | (0.593 to 0.676) | 78.00 | 0.260 | 68.42 | 57.59 | – | – | – | – |
| Men | 0.542 | 0.032 | 0.174 | (0.480 to 0.605) | 87.80 | 0.132 | 43.44 | 69.76 | – | – | – | – |
| WHR (cm/cm) | 0.567 | 0.018 | 0.000 | (0.539 to 0.594) | 0.86 | 0.123 | 61.63 | 50.64 | 0.000 | 0.223 | 0.001 | – |
| Women | 0.587 | 0.022 | 0.000 | (0.544 to 0.630) | 0.82 | 0.154 | 77.03 | 38.39 | – | – | – | – |
| Men | 0.524 | 0.032 | 0.433 | (0.463 to 0.586) | 0.89 | 0.098 | 57.38 | 52.41 | – | – | – | – |
| IFG+IGT | ||||||||||||
| WHtR (cm/cm) | 0.713 | 0.022 | 0.000 | (0.670 to 0.755) | 0.53 | 0.351 | 62.33 | 72.79 | – | 0.106 | 0.556 | 0.026 |
| BMI (kg/m2) | 0.685 | 0.022 | 0.000 | (0.642 to 0.729) | 23.38 | 0.316 | 77.40 | 54.22 | 0.106 | – | 0.254 | 0.492 |
| Waist circumference (cm) | 0.706 | 0.021 | 0.000 | (0.665 to 0.748) | 79.80 | 0.351 | 82.88 | 52.19 | 0.556 | 0.254 | – | 0.032 |
| Women | 0.732 | 0.026 | 0.000 | (0.682 to 0.783) | 79.80 | 0.420 | 79.57 | 62.38 | – | – | – | – |
| Men | 0.656 | 0.039 | 0.000 | (0.579 to 0.733) | 90.30 | 0.242 | 43.40 | 80.76 | – | – | – | – |
| WHR (cm/cm) | 0.667 | 0.022 | 0.000 | (0.638 to 0.695) | 0.87 | 0.274 | 69.18 | 58.23 | 0.026 | 0.492 | 0.032 | – |
| Women | 0.686 | 0.027 | 0.000 | (0.633 to 0.739) | 0.83 | 0.312 | 86.02 | 45.20 | – | – | – | – |
| Men | 0.631 | 0.038 | 0.003 | (0.556 to 0.705) | 0.92 | 0.261 | 54.72 | 71.38 | – | – | – | – |
| NDDM | ||||||||||||
| WHtR (cm/cm) | 0.730 | 0.017 | 0.000 | (0.696 to 0.764) | 0.52 | 0.366 | 74.21 | 62.43 | – | 0.000 | 0.001 | 0.010 |
| BMI (kg/m2) | 0.677 | 0.020 | 0.000 | (0.639 to 0.716) | 24.32 | 0.315 | 64.68 | 66.81 | 0.000 | – | 0.093 | 0.596 |
| Waist circumference (cm) | 0.700 | 0.018 | 0.000 | (0.665 to 0.735) | 78.00 | 0.292 | 81.35 | 47.81 | 0.001 | 0.093 | – | 0.429 |
| Women | 0.714 | 0.021 | 0.000 | (0.673 to 0.756) | 77.10 | 0.344 | 81.76 | 52.63 | – | – | – | – |
| Men | 0.686 | 0.033 | 0.000 | (0.622 to 0.750) | 88.00 | 0.298 | 56.99 | 72.85 | – | – | – | – |
| WHR (cm/cm) | 0.688 | 0.018 | 0.000 | (0.661 to 0.715) | 0.88 | 0.304 | 67.73 | 62.71 | 0.010 | 0.596 | 0.429 | – |
| Women | 0.696 | 0.022 | 0.000 | (0.653 to 0.738) | 0.84 | 0.301 | 79.75 | 50.31 | – | – | – | – |
| Men | 0.681 | 0.030 | 0.000 | (0.622 to 0.740) | 0.92 | 0.299 | 60.22 | 69.66 | – | – | – | – |
AUC, area under curve; BMI, body mass index; IFG, impaired fasting glucose; IGT, impaired glucose tolerance; NDDM, newly diagnosed diabetes mellitus; ROC, receiver operating characteristic; WHR, waist-to-hip ratio; WHtR, waist-to-height ratio.