Table 3 Study population distribution across phenotype category
COPDNo COPDTotal
Asthma*Chronic bronchitis*Emphysema*617
No emphysema151328
No chronic bronchitisEmphysema9211
No emphysema234063
No asthmaChronic bronchitisEmphysema606
No emphysema21719
No chronic bronchitisEmphysema10818
No emphysema25292317
Total96373469
  • COPD, chronic obstructive pulmonary disease (defined as post-bronchodilator FEV1/FVC <0.7).

  • *See text for definitions of these phenotypes.