Table 2.
Comparison of RHC parameters between cluster 1 and cluster 2 in SLE-PAH patients at baseline assessment
| RHC parameters | Overall (n = 46) | Cluster 1 (n = 38) | Cluster 2 (n = 8) | P-value* |
|---|---|---|---|---|
| mPAP (mmHg) | 40.0 (28.8, 49.3) | 39.5 (28.0, 49.3) | 42.5 (34.0, 51.3) | 0.270 |
| PAWP (mmHg) | 5.0 (4.0, 7.0) | 5.5 (4.0, 7.0) | 4 (3.0, 8.8) | 0.518 |
| PVR (WU) | 6.5 (4.6, 9.9) | 6.4 (4.1, 9.4) | 10.1 (5.6, 13.4) | 0.044 |
| CI (L/min × m2) | 3.3 (2.5, 3.7) | 3.4 (2.8, 3.7) | 2.3 (2.1, 2.8) | 0.005 |
| RAP (mmHg) | 3.0 (2.0, 3.0) | 3.0 (2.0, 5.0) | 3.5 (3.0, 6.5) | 0.265 |
| SVO2 (%) | 67.5 (61.8, 72.9) | 68.7 (63.5, 72.9) | 64.3 (60.2, 73.4) | 0.094 |
Results are expressed as median (interquartile ranger). Mann–Whitney U test was used for continuous variables
Abbreviations: RHC right heart catheterization, mPAP mean pulmonary arterial pressure, PAWP pulmonary arterial wedge pressure, PVR pulmonary vascular resistance, WU Wood units, CI cardiac index, RAP right arterial pressure, SVO2 mixed venous oxygen saturation
*P-value < 0.05 is shown in bold