| Diagnostic group(total n = 85) | M:F ratio(% male) | Median (range)age (years) |
| Acute pneumonia/pneumonitis (n = 13) | 9:4 (69) | 4.0 (0.1–16.3) |
| Cystic fibrosis (n = 37) | 13:24 (35) | 7.7 (0.3–16.8) |
| PCD (n = 6) | 2:4 (33) | 9.5 (5.7–14.8) |
| RLRTI (n = 22) | 11:11 (50) | 5.3 (0.9–15.2) |
| Acute non-infective “other” (n = 4) | 2:2 (50) | 8.0 (0.2–15.1) |
| Upper airway (n = 3) | 3:0 (100) | 7.2 (5.8–7.5) |
| p Value | NS | NS |
PCD, primary ciliary dyskinesia; RLRTI, recurrent lower respiratory tract infections.