Table 3.
Etiology of the non-CF bronchiectasis patients.
| Etiology, N, % | Total | Below-Threshold Cluster | Above-Threshold Cluster |
|---|---|---|---|
| Post-infectious | 343, 37.9% | 113, 42% | 230, 36.2% |
| Tuberculosis | 122, 13.5% | 42, 15.6% | 80, 12.6% |
| Childhood infections | 83, 9.2% | 26, 9.6% | 57, 9% |
| Necrotizing pneumonia | 29, 3.2% | 6, 2.2% | 23, 3.6% |
| Non-tuberculous mycobacteria | 10, 1.1% | 3, 1.1% | 7, 1.1% |
| Fungal infections | 4, 0.4% | 2, 0.7% | 2, 0.3% |
| Others | 658, 72.6% | 191, 70.7% | 467, 73.4% |
| COPD | 103, 11.4% | 34, 12.6% | 69, 10.8% |
| Asthma | 90, 9.9% | 24, 8.9% | 66, 10.4% |
| Hyperimmune response | 3, 0.3% | 1, 0.4% | 2, 0.3% |
| Vasculitis | 2, 0.2% | 0 | 2, 0.3% |
| Systemic disorders | 78, 8.6% | 17, 6.3% | 61, 9.6% |
| Immunodeficiencies | 42, 4.6% | 13, 4.8% | 29, 4.6% |
| Inflammatory pneumonitis | 21, 2.3% | 7, 2.6% | 14, 2.2% |
| Congenital malformations | 9, 1% | 1, 0.4% | 8, 1.3% |
| Inflammatory bowel diseases | 9, 1% | 2, 0.7% | 7, 1.1% |
| Obliterative bronchiolitis | 6, 0.7% | 3, 1.1% | 3, 0.5% |
| Unknown etiology | 166, 18.3% | 45, 16.7% | 121, 19.0% |
| Other etiologies | 34, 3.8% | 10, 3.7% | 24, 3.8% |
Absolute number of patients and percentage for each etiologic condition. Definitions of the abbreviations: N, number; %, percentage; COPD: chronic obstructive pulmonary disease.