Table 3.
Indoor radon activity concentration and potential risk of lung cancer during burning and non-burning seasons to Chiang Mai residents during 2018–2020.
| Burning Season | Non-Burning Season | Total | |
|---|---|---|---|
| No. of dwellings | 45 | 45 | 45 |
| Period (months) | 6 | 6 | 12 |
| Max (Bq/m3) | 230 | 139 | 230 |
| Min (Bq/m3) | 28 | 19 | 19 |
| Mean ± SD (Bq/m3) | 63 ± 33 | 46 ± 19 | 55 ± 28 |
| Median (IQR) (Bq/m3) | 61 (35) | 42 (16) | 48 (27) |
| Geomean (Bq/m3) | 57 | 44 | 50 |
| No. of Dwellings >39 Bq/m3 | 34 | 24 | 19 (42.2%) |
| No. of Dwellings >100 Bq/m3 | 2 | 1 | 1 (2.2%) |
| H (mSv/y) | 1.6 | 1.2 | 1.4 ± 0.3 |
| HL (mSv/y) | 3.8 | 2.8 | 3.3 ± 0.7 |
| ELCR (%) | 0.67 | 0.5 | 0.58 ± 0.12 |
| LCC (×10−6) | 28.44 | 21 | 24.72 ± 5.26 |
Abbreviations: SD, standard deviation; IQR, interquartile range; H, annual effective dose; HL, annual effective dose to lungs; ELCR, excess lifetime cancer risk; LCC, the number of LC cases per year per million.