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The correlation between demographics, 6MWD, CPET parameters, and HRR1 of IPAH patients.
| Parameters | r | P |
|---|---|---|
| NYHA FC | −0.6 | <0.01 |
| NT-proBNP (pg/ml) | −0.3 | <0.01 |
| 6MWD (m) | 0.4 | <0.01 |
| Peak Load (W) | 0.5 | <0.01 |
| peak VO2/kg (ml/min/kg) | 0.56 | <0.01 |
| Peak VO2 (ml/min) | 0.6 | <0.01 |
| Peak VO2% pred | 0.5 | <0.01 |
| Peak O2 pulse (ml/beat) | 0.4 | <0.01 |
