From: Dyspnea assessment and adverse events during sputum induction in COPD
Cut-off value | Sensitivity | Specificity | Positive predictive value | Negative predictive value | |
---|---|---|---|---|---|
A 2 ge | >70 | 65 | 52 | 42 | 77 |
FEV 1 , (% pred) | <40 | 83 | 64 | 47 | 91 |
ΔSpO 2 (%) | ≤91 | 74 | 78 | 54 | 88 |
MRC score | > 2 | 52 | 86 | 56 | 82 |
Borg | >4 | 66 | 55 | 44 | 80 |
6MWT distance (m) | ≤155 | 52 | 98 | 90 | 84 |
ΔBorg 6MWT | >2 | 82 | 55 | 33 | 73 |