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Table 2 Angle of collapse in different GOLD stages

From: Computer quantification of airway collapse on forced expiration to predict the presence of emphysema

  No Emphysema Emphysema  
  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
  1. Values are means ± SD.