Table 6 Improvement in predicting prediabetes by adding the TyG index versus BMI to the different conventional risk factors
Prediabetes | C statistic | IDI | NRI | |||
|---|---|---|---|---|---|---|
Estimate (95% CI) | P* | Estimate (95% CI), % | P | Estimate (95% CI), % | P | |
Family history of diabetes | ||||||
  + TyG | 0.606 (0.586–0.625) | 0.0013 | 2.19 (1.72–2.67) | < 0.0001 | 30.57 (23.66–37.47) | < 0.0001 |
  + BMI | 0.571 (0.551–0.591) |  | 0.83 (0.55–1.12) | < 0.0001 | 18.98 (12.03–25.92) | < 0.0001 |
CVD | ||||||
  + TyG | 0.602 (0.583–0.622) | 0.0014 | 2.19 (1.71–2.65) | < 0.0001 | 30.70 (23.80–37.60) | < 0.0001 |
  + BMI | 0.565 (0.545–0.585) |  | 0.79 (0.51–1.07) | < 0.0001 | 18.27 (11.33–25.22) | < 0.0001 |
Hypertension | ||||||
  + TyG | 0.610 (0.590–0.629) | 0.0005 | 1.47 (0.95–2.00) | < 0.0001 | 17.82 (10.87–24.77) | < 0.0001 |
  + BMI | 0.577 (0.557–0.597) |  | 0.55 (0.31–0.79) | < 0.0001 | 14.02 (7.06–20.97) | < 0.0001 |
1/HDL-C | ||||||
  + TyG | 0.600 (0.580–0.620) | 0.0017 | 1.60 (1.19–2.00) | < 0.0001 | 22.30 (15.37–29.23) | < 0.0001 |
  + BMI | 0.567 (0.547–0.587) |  | 0.50 (0.28–0.72) | < 0.0001 | 17.46 (10.51–24.41) | < 0.0001 |
TG | ||||||
  + TyG | 0.603 (0.584–0.623) | 0.0364 | 1.34 (0.97–1.71) | < 0.0001 | 26.93 (20.19–33.66) | < 0.0001 |
  + BMI | 0.588 (0.568–0.607) |  | 0.50 (0.27–0.72) | < 0.0001 | 13.66 (6.70–20.61) | < 0.0001 |