Cluster 1: “Pseudomonas” | Cluster 2: “Other chronic infection” | Cluster 3: “Daily sputum” | Cluster 4: “Dry bronchiectasis” | Overall p-value | |
Patients | 179 (100) | 273 (100) | 373 (100) | 307 (100) | |
Idiopathic | 46 (26) | 86 (33) | 131 (36) | 110 (36) | 0.09 |
Post-infective | 63 (36) | 54 (21) | 96 (26) | 77 (25) | 0.004 |
COPD | 21 (12) | 29 (11) | 50 (14) | 20 (6.6) | 0.03 |
Connective tissue disease | 10 (5.6) | 26 (9.8) | 26 (7.1) | 27 (8.9) | 0.377 |
Immunodeficiency | 11 (6.2) | 17 (6.4) | 14 (3.8) | 14 (4.6) | 0.436 |
ABPA | 10 (5.6) | 20 (7.6) | 12 (3.3) | 12 (3.9) | 0.083 |
Asthma | 2 (1.1) | 10 (3.8) | 8 (2.2) | 15 (4.9) | 0.071 |
Inflammatory bowel disease | 3 (1.7) | 6 (2.3) | 12 (3.3) | 3 (1) | 0.233 |
Ciliary dysfunction | 7 (4) | 6 (2.3) | 5 (1.4) | 2 (0.7) | 0.055 |
Aspiration | 2 (1.1) | 6 (1.9) | 3 (0.8) | 3 (1) | 0.419 |
α1-antitrypsin deficiency | 0 (0) | 1 (0.4) | 3 (0.8) | 6 (2) | 0.091 |
Congenital | 0 (0) | 2 (0.8) | 3 (0.8) | 0 (0) | 0.284 |
Other | 2 (1.1) | 1 (0.4) | 2 (0.5) | 15 (4.9) | <0.001 |
Data are presented as n (%), unless otherwise stated. COPD: chronic obstructive pulmonary disease; ABPA; allergic bronchopulmonary aspergillosis.