Relationship between number of exacerbations per year and prednisolone response using the Callahan and ATS definitions
| Fluticasone propionate | Placebo | % reduction (95% CI) | |||
|---|---|---|---|---|---|
| n | Mean* | n | Mean* | ||
| *Mean number of exacerbations per year from Poisson model. | |||||
| Callahan responder | 29 | 0.85 | 33 | 1.90 | 55% (25 to 74) |
| Callahan non-responder | 232 | 1.32 | 229 | 1.55 | 15% (0 to 28) |
| ATS responder | 37 | 1.10 | 37 | 1.68 | 35% (0 to 58) |
| ATS non-responder | 224 | 1.39 | 225 | 1.57 | 17% (2 to 30) |