Patient characteristics
| CF not steroid-treated | CF steroid-treated | Normal Subjects | |
| Subject n | 20 | 16 | 14 |
| Age yrs | 27±2 | 30±2 | 34±2 |
| Sex M/F | 14/6 | 9/7 | 6/8 |
| FVC % pred | 86.3±4.9 | 74.7±5.5 | 100.5±3.1 |
| FEV1 % pred | 67.5±6.5 | 51.9±4.9 | 101.8±2.6 |
| P. aeruginosa in sputum culture 105 cfu·mL−1 | 9 | 13 | 0 |
| Therapy: | |||
| Inhaled steroids | 0 | 9 | 0 |
| Oral steroids | 0 | 5 | 0 |
| Oral+inhaled steroids | 0 | 2 | 0 |
Data are presented as mean±sem or numbers of objects
CF: cystic fibrosis patients
M: male
F: female
FEV1: forced expiratory volume in one second
FVC: forced vital capacity
PA: Pseudomonas aeruginosa