Table 6.
Statistically significant relationships between the MRC chronic dyspnea score and the parameters of the cardiopulmonary exercise testing (CPET) in the study population quantified using Spearman's rank correlation coefficient
| CPET parameter | MRC score | |
|---|---|---|
| VO2 peak | r | -.496 |
| p | .012 | |
| VO2 peak % | r | -.481 |
| p | .017 | |
| VO2 peak/kg | r | -.731 |
| p | <.001 | |
| SPO2 peak | r | -.682 |
| p | <.001 | |
| BR peak % | r | -.437 |
| p | .029 | |
| VE/VCO2 slope | r | .731 |
| p | <0.001 | |
| HR recovery | r | -.629 |
| p | .001 | |
| VE/VCO2 at AT* | r | 0.630 |
| p | .002 | |
| Borg scale at peak exercise | r | 0.5 |
| p | .01 |
VO2 peak: oxygen uptake at peak exercise, AT anaerobic threshold, SPO2 oxygen saturation, VE peak: minute ventilation at peak exercise, VE/VCO2 slope: slope of relationship between VE and VCO2, HR Heart rate, *VE/VCO2 at AT refers to 21 patients who reached AT