Table 5.
Cubic polynomial regression model for indices of right ventricular size and function
| Variable | Intercept (β0) | β1 | β2 | β3 | MSE | R2 |
|---|---|---|---|---|---|---|
| RVD1 | 16.343 | 19.332 | 0.001 | -2.548 | 3.278 | 0.380 |
| RVD2 | 8.226 | 24.559 | 0.001 | -6.629 | 2.918 | 0.322 |
| RVD3 | 23.119 | 33.822 | 0.001 | -1.980 | 5.678 | 0.440 |
| TAPSE | 13.499 | 7.043 | 0.001 | -0.355 | 1.996 | 0.226 |
| S’ | 15.762 | 3.200 | 0.001 | -0.649 | 2.175 | 0.010 |
β1, β2, and β3, regression coefficients; MSE, mean square error; R2, coefficient of determination; RVD1, right ventricular end-diastolic basal diameter; RVD2, right ventricular end-diastolic mid-cavity diameter; RVD3, right ventricular end-diastolic length; TAPSE, tricuspid annular plane systolic excursion; S′, tissue Doppler-derived right ventricular systolic excursion velocity.