Table 3 Performance of the TyG index versus FPG in predicting the incidence of prediabetes in subgroups with the different characteristics
Subgroup | AUC (95% CI) | Cut-off point | P |
|---|---|---|---|
Gender | |||
 Male (n = 1275) | |||
  TyG | 0.568 (0.532–0.604) | 8.56 | Ref. |
  FPG | 0.595 (0.560–0.631) | 5.27 | 0.2636 |
 Female (n = 2818) | |||
  TyG | 0.616 (0.592–0.639) | 8.45 | Ref. |
  FPG | 0.589 (0.566–0.613) | 5.04 | 0.0872 |
Age | |||
  < 60 years (n = 3204) | |||
  TyG | 0.606 (0.584–0.629) | 8.47 | Ref. |
  FPG | 0.603 (0.581–0.625) | 5.04 | 0.8179 |
  ≥ 60 years (n = 889) | |||
  TyG | 0.576 (0.535–0.617) | 8.41 | Ref. |
  FPG | 0.540 (0.499–0.580) | 5.07 | 0.1863 |
Lipid metabolism | |||
 With normal lipid metabolism (n = 3041) | |||
  TyG | 0.591 (0.567–0.615) | 8.45 | Ref. |
  FPG | 0.599 (0.576–0.621) | 5.04 | 0.6223 |
 With abnormal lipid metabolism (n = 1052) | |||
  TyG | 0.588 (0.551–0.624) | 8.86 | Ref. |
  FPG | 0.562 (0.525–0.600) | 5.05 | 0.3248 |
Obesity status | |||
 18.5 ≤ BMI < 24.0 kg/m2 (n = 1581) | |||
  TyG | 0.594 (0.560–0.628) | 8.46 | Ref. |
  FPG | 0.620 (0.587–0.653) | 5.01 | 0.2635 |
 BMI ≥ 24.0 kg/m2 (n = 2462) | |||
  TyG | 0.590 (0.566–0.615) | 8.47 | Ref. |
  FPG | 0.565 (0.541–0.590) | 5.04 | 0.1313 |