Minimal important difference | Sildenafil | Placebo | p-value | |
Subjects n | 29 | 31 | ||
Cycle endurance time | +34% from baseline [25] | 17 (59) | 18 (58) | 1.00 |
Maximal exercise workload | +4 W [26] | 16 (55) | 12 (39) | 0.30 |
6-min walk distance | +26 m [26] | 13 (45) | 13 (42) | 1.00 |
Total score in St George's Respiratory Questionnaire | -4 points [27] | 13 (45) | 13 (42) | 0.82 |
Data are presented as n (%), unless otherwise stated. p-values derived from the Fisher exact test.