Table 3.
Predictors of fasting plasma TG concentrations and SIMeal and SIIVGTT
| Model R2 | Partial R2 | P | |
|---|---|---|---|
| Models for plasma TG | |||
| Model 1 | |||
| Total variance in plasma TG | 35.8% | <0.001 | |
| Meal nadir palmitate concentration (μmol/liter) | 11.2% | <0.001 | |
| VAT (kg) | 16.4% | <0.001 | |
| Sex | 5.4% | 0.002 | |
| Age group (young/elderly) | 1.6% | 0.088 | |
| Model 2 | |||
| Total variance plasma TG | 32.6% | <0.001 | |
| IVGTT nadir palmitate concentration (μmol/liter) | 6.7% | <0.001 | |
| VAT (kg) | 20.6% | <0.001 | |
| Sex | 2.4% | 0.032 | |
| Age group (young/elderly) | 3.7% | 0.008 | |
| Models for insulin sensitivity | |||
| Model 3 | |||
| Total variance in SIMeal | 25.6% | <0.001 | |
| Meal nadir palmitate concentration (μmol/liter) | 9.9% | <0.001 | |
| UBSQ (kg) | 4.5% | 0.004 | |
| VO2 max (ml/kg FFM/min) | 4.0% | 0.007 | |
| Sex | 4.2% | 0.006 | |
| Model 4 | |||
| Total variance in SIIVGTT | 44.4% | <0.001 | |
| IVGTT nadir palmitate concentration (μmol/liter) | 9.7% | <0.001 | |
| VAT (kg) | 8.3% | <0.001 | |
| UBSQ (kg) | 5.1% | 0.002 | |
| VO2 max (ml/kg FFM/min) | 7.2% | <0.001 | |
| Age group (young/elderly) | 3.0% | 0.020 |
Model R2 measures the percentage of the total variance in dependent variable (fasting TG and insulin sensitivity) explained by the collection of independent variables determined by multiple linear regression analysis. Partial R2 measures the percentage of residual variance explained by each independent variable when adjusted for the remaining independent variables included in the model.