Mean clinical data (95% confidence intervals) in 1997 by age group
| Age group (years) | Weight for height (% pred) | Vital capacity (% pred) | FEV1 (% pred) | IgG (g/l) | Po2 (kPa) | mEF25 (% pred) |
|---|---|---|---|---|---|---|
| FEV1=forced expiratory volume in 1 second; Po2=oxygen tension; MEF25=mid expiratory flow at 25% of vital capacity. | ||||||
| Numbers in square brackets indicate percentage of patients with abnormal results. | ||||||
| 2–5.9 (n=459) | 98.2 (97.3 to 99.1) [19.0] | – | – | 8.1 (7.7 to 8.5) [14.2] | 9.9 (8.1 to 11.7) [53.8] | – |
| 6–11.9 (n=866) | 96.6 (95.8 to 97.3) [25.3] | 85.3 (84.2 to 86.4) [35.7] | 86.7 (85.2 to 88.1) [25.4] | 10.8 (10.5 to 11.1) [34.8] | 10.8 (10.2 to 11.3) [47.7] | 68.2 (65.5 to 70.9) [46.6] |
| 12–17.9 (n=858) | 97.6 (96.7 to 98.5) [31.5] | 84.1 (82.7 to 85.5) [38.5] | 78.8 (77.1 to 80.5) [42.0] | 13.8 (13.5 to 14.2) [53.4] | 10.7 (10.3 to 11.1) [50.0] | 57 (54.3 to 59.7) [59.4] |
| > 18 (n=1115) | 19.8 (19.7 to 20.0) [38.3] | 71.4 (70.1 to 72.7) [62.8] | 54.5 (53.1 to 56.0) [79.3] | 15.9 (15.6 to 16.2) [65.4] | 10.0 (9.7 to 10.3) [67.8] | 29.2 (27.3 to 31.1) [88.9] |