Table 2 Angle of collapse in different GOLD stages
From: Computer quantification of airway collapse on forced expiration to predict the presence of emphysema
| Â | No Emphysema | Emphysema | Â | ||
|---|---|---|---|---|---|
| Â | N | AC | N | AC | p value |
No COPD | 124 | 156 (±7) | 14 | 157 (±5) | 0.7261 |
GOLD I | 48 | 152 (±6) | 29 | 148 (±5) | 0.0056 |
GOLD II | 28 | 146 (±7) | 73 | 138 (±9) | <.0001 |
GOLD III | 16 | 137 (±6) | 81 | 126 (±9) | <.0001 |
GOLD IV | 7 | 123 (±16) | 54 | 117 (±8) | 0.0858 |