Laryngeal narrowing ratios at rest and peak exercise
| Glottic narrowing ratio | Supra-glottic narrowing ratio | |||||
|---|---|---|---|---|---|---|
| Healthy | Mild–mod COPD | Severe COPD | Healthy | Mild–mod COPD | Severe COPD | |
| Rest | 0.14 (0.05) | 0.43 (0.09)* | 0.63(0.07)** | 0.14 (0.03) | 0.31 (0.10) | 0.36 (0.05)* † |
| Exercise | 0.16 (0.08) | 0.35 (0.08) | 0.64 (0.05)**† | 0.10 (0.05) | 0.20 (0.06) | 0.43 (0.07)**† |
| Change | 0.02 (0.09) | −0.09 (0.05) | −0.01 (0.07) | −0.04 (0.07) | −0.11 (0.08) | −0.07 (0.07) |
Data shown as mean (SEM). *p<0.05, **p<0.01 from healthy, †p<0.05, ††p<0.01 from mild–mod COPD.