Table 1 Demographics of subjects
Parameters | N (%) |
|---|---|
Age (mean ± SD) | 57.2 ± 17.9 |
Male | 293,762 (40.3) |
Subjects with medical aid insurance | 675,479 (92.6) |
Hospital type | |
Primary | 599,460 (82.2) |
Secondary | 56,484 (7.7) |
Tertiary | 158,043 (21.7) |
Tests subjects were taken | |
Chest X-rays | 118,479 (16.2) |
Chest CT | 2291 (0.3) |
Pulmonary function test | 154,984 (21.2) |
Co-morbidity | |
Ischemic heart disease | 21,191 (2.9) |
Osteoporosis | 16,138 (2.2) |
Depressive disorder | 7703 (1.1) |
Arthritis | 24,392 (3.3) |
Diabetes mellitus | 56,355 (7.7) |
Pneumothorax | 716 (0.1) |
Congestive heart failure | 10,914 (1.5) |
Hypertension | 111,249 (15.3) |
Anemia | 7412 (1.0) |
Metabolic syndrome | 47,605 (6.5) |
Allergic rhinitis | 482,540 (66.2) |
Charlson’s comorbidity index (mean ± SD) | 1.3 ± 0.7 |
Subjects admitted with exacerbated asthma in previous year | 18,899 (2.6) |
Frequent visitor | 496,560 (68.1) |
Total | 729,343 (100.0) |