Table 1. Patient groups.
| Cystic fibrosis | Controls | |
| N | 59 | 26 |
| Age [yrs] | 22±15 | 25±9 |
| Sex (m∶f) | 31/28 | 12/14 |
| WBC (109/l) | 10±5 | 8±3 |
| FEV1 (% pred) | 63±15 | - |
| Neutrophils in sputa (%) | 83±32 | 17±10 |
| P. aeruginosa † | 35 | 0 |
| Antibiotics | 35 | 0 |
| dF508homozygous/heterozygous/other | 34/19/6 | n.d. |
Results are expressed as means ± SD; m: male, f: female; WBC: white blood count; FEV1: Forced expiratory volume in 1 second (% of predicted);
†
P. aeruginosa bacteria isolated in at least 2 consecutive sputum samples with a minimum of a 6-month interval; n.d. not determined.