Table 2.
Relationship between radon, FEV1% in last spirometry and admissions due to COPD exacerbation in preceding 2 years.
| Radon concentration (Bq/m3) | p-value (chi-squared) | |||
|---|---|---|---|---|
| < 100 | 100–299 | ≥ 300 | ||
| FEV1% last spirometry (all patients) | ||||
| ≥ 50 | 27 (51.9) | 48 (57.1) | 29 (64.4) | 0.460 |
| < 50 | 25 (48.1) | 36 (42.9) | 16 (35.6) | |
| FEV1% last spirometry (patients who lived more than 30 years in the same dwelling) | ||||
| ≥ 50 | 14 (51.9) | 25 (56.8) | 16 (66.7) | 0.554 |
| < 50 | 13 (48.1) | 19 (43.2) | 8 (33.3) | |
| Admissions due to COPD exacerbation in preceding 2 years | ||||
| 0 | 28 (53.8) | 47 (56.0) | 21 (46.7) | 0.465 |
| 1 | 12 (23.1) | 19 (22.6) | 11 (24.4) | |
| ≥ 2 | 12 (23.1) | 18 (21.4) | 13 (28.9) | |