Table 2: Spearman's correlation.
| Reduction of base-line dyspnea (NAS) | Base-line dyspnea before TD BUP (NAS) | PF before TD BUP | BF before TD BUP | ||
| Reduction of base-line dyspnea (NAS) | R | 1.000 | -0.557** | -0.016 | -0.322 |
| p-value | 0 | 0.004 | 0.472 | 0.077 | |
| Base-line dyspnea before TD BUP (NAS) | R | -0.557** | 1.000 | 0.300 | 0.590** |
| p-value | 0.004 | 0 | 0.068 | 0.001 | |
| PF before TD BUP | R | -0.016 | 0.300 | 1.000 | 0.521** |
| p-value | 0.472 | 0.068 | 0 | 0.003 | |
| BF before TD BUP | R | -0.322 | 0.590** | 0.521** | 1.000 |
| p-value | 0.077 | 0.001 | 0.003 | 0 |
R: correlation coefficient (1-tailed)
*: p-value < 0.05
**: p-value < 0.001