Table 6.
Firth logistic regression models for the prediction of insulin resistance (Matsuda index < 4) using WHtR.
| Variable | Regression coefficient | Standard error | p value |
|---|---|---|---|
| Model 1 | |||
| Intercept | − 7.7980 | 0.7030 | < .0001 |
| Age (per year) | 0.00226 | 0.00463 | 0.6255 |
| Male sex | − 3.1672 | 1.2916 | 0.0142 |
| WHtR (per unit) | 13.3820 | 1.2607 | < .0001 |
| WHtR × male | 6.3336 | 2.3113 | 0.0061 |
| Model 2 | |||
| Intercept | − 11.4816 | 0.8621 | < .0001 |
| Age (per year) | − 0.00219 | 0.00509 | 0.6663 |
| Male sex | − 4.1626 | 1.3930 | 0.0028 |
| WHtR (per unit) | 10.4148 | 1.3112 | < .0001 |
| WHtR × male | 6.8426 | 2.4735 | 0.0057 |
| Fasting blood glucose (per mmol/l) | 0.9109 | 0.1020 | < .0001 |
| TG/HDL-C (per mmol/l) | 0.8678 | 0.1144 | < .0001 |