Table 4.
Evaluation of the predictive power of smoking and alcohol variables on a high TyG index
| KNHANES (2013–2018) | P | KOICA (2012–2016) | P | |||
|---|---|---|---|---|---|---|
| Multivariate model | Multivariate model | Multivariate model | Multivariate model | |||
| Without S and Aa | With S and Ab | Without S and Ac | With S and Ad | |||
| AUC (95 CI) | 0.817 (0.805–0.829) | 0.829 (0.818–0.841) | <.001 | 0.822 (0.811–0.834) | 0.826 (0.815–0.838) | <.001 |
| NRI (95 CI) | Reference | 0.040 (0.014–0.050) | <.001 | Reference | 0.025 (0.007–0.043) | .006 |
| IDI (95 CI) | Reference | 0.017 (0.006–0.013) | <.001 | Reference | 0.005 (0.003–0.008) | <.001 |
aWithout S and A model = age + sex + final education + SBP + WC + TC + HDL
bWith S and A model = age + sex + final education + SBP + WC + TC + HDL + S and A
cWithout S and A model = sex + SBP + BMI + TC + HDL + regular exercise
dWithout S and A model = sex + SBP + BMI + TC + HDL + regular exercise + S and A
The high TyG index group comprises subjects with a TyG index ≥8.8
KNHANES Korean National Health and Nutrition Examination Survey, KOICA Korean Initiatives on Coronary Artery Calcification, S and A Smoking and alcohol consumption, AUC The area under the receiver operating characteristic (ROC) curve, NRI Net reclassification improvement, IDI Integrated discrimination improvement, WC Waist circumference, BMI Body mass index, TC Total cholesterol, HDL High density lipoprotein