Patient characteristics
| Patient characteristics | Outcome/Category | South of England N = 3017 | North of England N = 3400 | P-values |
|---|---|---|---|---|
| Sample size | ||||
| 0 – <16 (Children) | 1265 (41.9) | 1483 (43.62) | 0.1805 | |
| ≥16 (Adults) | 1752 (58.1) | 1917 (56.38) | ||
| Age (Years) | Mean ± SD | 19.71 ± 13.24 | 18.81 ± 12.52 | |
| Gender, n(%) | ||||
| Female | 1423 (47,17) | 1578 (46.41) | 0.5623 | |
| Male | 1594 (52.83) | 1822 (53.59) | ||
| Percent predicted FEV1, n(%) | ||||
| <40 | 333 (11.04) | 341 (10.03) | ||
| 40–69 | 728 (24.13) | 846 (24.88) | ||
| ≥70 | 1335 (44.25) | 1443 (42.44) | ||
| Age at diagnosis, n(%) | ||||
| <3 months; n (%) | 1280 (42.43) | 1590 (46.76) | <0.001 | |
| 3–12 months; n (%) | 629 (20.85) | 645 (18.97) | ||
| 12 months–3 years; n (%) | 416 (13.79) | 474 (13.94) | ||
| ≥3 years; n (%) | 453 (15.01) | 488 (14.35) | ||
| FEV1 percent predicted | ||||
| All patients | Mean ± SD | 70.98 ± 24.66 | 71.23 ± 24.23 | 0.9821 |
| Children (Age < 16) | Mean ± SD | 84.51 ± 17.99 | 81.57 ± 19.80 | 0.0061 |
| adults (Age ≥ 16) | Mean ± SD | 64.69 ± 24.81 | 66.73 ± 24.61 | 0.0422 |