Table 1.
I: Mild | II: Moderate | III: Severe | IV: Very severe | Total | Source | |
---|---|---|---|---|---|---|
% population | 42% | 41% | 13% | 4% | 100% | Price et al 2004 |
Initial population | 1,216,444 | 1,187,481 | 376,518 | 115,852 | 2,896,296 | |
FEV1 (% predicted) | 89.80% | 63.70% | 40.00% | 26.20% | Antonelli-Incalzi et al 2003 | |
Exacerbations/patient/year | 0 | 0.8 | 1.8 | 2.6 | Authors’ estimate from ISOLDE (Hankinson et al 1999; Burge and Wedzicha 2003) |