Ciliary ultrastructural analysis of PCD patients with identified CCDC39 and CCDC40 mutations (CCDC39 and CCDC40 groups)
| CCDC39 group | CCDC40 group | p Value | |
| Total number of patients with available quantitative analysis | 25 | 7 | |
| Ciliary length (μm) median (25th; 75th IQR) | 5.59 (5.47; 5.86) | 5.45 (5.38; 5.75) | NS |
| Ciliary orientation, n (%) | NS | ||
| Normal | 3 (12) | 2 (28.6) | |
| Abnormal | 22 (88) | 4 (57.1) | |
| Non-evaluable | 0 (0) | 1 (14.3) | |
| Compound cilia, n (%) | NS | ||
| Absent | 19 (76) | 4 (57.1) | |
| Present | 6 (24) | 3 (42.9) |
NS, non-significant; PCD, primary ciliary dyskinesia.