| Independent Samples Test* | ||
| Patients with and without CTEPH | t-test for Equality of Means | |
| t | Sig. (2-tailed) | |
| Right Atrium Diameter (mm) | 6.013 | 0.000 |
| Right Ventricle Diameter (mm) | 7.956 | 0.000 |
| Inter-Ventricular Septum Width (mm) | 3.208 | 0.002 |
| Myocardium Thickening (mm) | 2.120 | 0.037 |
| Pulmonary Trunk Diameter (mm) | 10.323 | 0.000 |
| Right Main Pulmonary Artery Diameter (mm) | 8.198 | 0.000 |
| Left Main Pulmonary Artery Diameter (mm) | 6.694 | 0.000 |
| Right Distal Pulmonary Artery Diameter (mm) | 2.529 | 0.014 |
| Left Distal Pulmonary Artery Diameter (mm) | 3.453 | 0.001 |