Table 3

Severity of COPD airflow limitation (AFL) and mortality within the three differing severity classifications

Severity of COPD by AFLCOPD-X
(n=238)*
GOLD
(n=238)
GLI-2012
(n=238)
Mild35 (15%)5 (2%)16 (7%)
Moderate96 (40%)78 (33%)43 (18%)
Severe102 (43%)97 (41%)83 (35%)
Very severe58 (24%)96 (40%)
Mortality (all cause)COPD-X
(n=38)
GOLD
(n=38)
GLI-2012
(n=35)
Mild2 (5%)0 (0%)1 (3%)
Moderate10 (26%)6 (16%)3 (9%)
Severe26 (68%)15 (39%)10 (29%)
Very severe17 (45%)21 (60%)
  • *Five patients had FEV1 >80% which are unclassified according to COPD-X criteria.

  • COPD, chronic obstructive pulmonary disease; COPD-X, concise tool for chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 s; GLI, global lung initiative; GOLD, global initiative for chronic obstructive lung disease.