Table 2.
The mean values and spatial coefficient of variation (COV) for short-term and long-term radon gas, airborne PAECs, dose rate, and surface-deposited radon decay products by smoking environment.
| Variables | Smoking environment (n) | Mean value | COV,a total % | House to house, % | Within house,b % |
|---|---|---|---|---|---|
| Short-term radon (Bq m−3) | Nonsmoking (44) | 302 | 68 | 48 | 43 |
| Smoking (32) | 150 | 72 | 65 | 12 | |
| Total (76) | 238 | 79 | 62 | 42 | |
| Long-term radon (Bq m−3) | Nonsmoking (44) | 313 | 57 | 40 | 34 |
| Smoking (32) | 179 | 60 | 53 | 12 | |
| Total (76) | 257 | 64 | 51 | 32 | |
| Unattached PAEC (nJ m−3) | Nonsmoking (44) | 102 | 86 | 59 | 53 |
| Smoking (32) | 34 | 84 | 55 | 50 | |
| Total (76) | 74 | 105 | 77 | 58 | |
| Attached PAEC (nJ m−3) | Nonsmoking (44) | 376 | 138 | 69 | 99 |
| Smoking (32) | 368 | 100 | 84 | 54 | |
| Total (76) | 374 | 124 | 72 | 86 | |
| Pdose (mSv y−1) | Nonsmoking (44) | 38.4 | 87 | 57 | 54 |
| Smoking (32) | 14.4 | 83 | 63 | 43 | |
| Total (76) | 28.3 | 103 | 74 | 58 | |
| Jdose (mSv y−1) | Nonsmoking (44) | 23.0 | 93 | 54 | 61 |
| Smoking (32) | 11.9 | 85 | 73 | 39 | |
| Total (76) | 18.3 | 100 | 66 | 61 | |
| Deposited 218Po (Bq m−2) | Nonsmoking (40) | 43.1 | 116 | 36 | 105 |
| Smoking (21) | 24.9 | 76 | 60 | 68 | |
| Total(61) | 36.8 | 117 | 43 | 106 | |
| Deposited 214Po (Bq m−2) | Nonsmoking (40) | 31.8 | 74 | 53 | 38 |
| Smoking (21) | 17.3 | 64 | 37 | 50 | |
| Total(61) | 26.8 | 79 | 57 | 42 |
a
The instrumental uncertainties in radon gas concentrations are typically about 10 to 15%. The uncertainties in airborne radon and deposited radon decay product concentrations are in the range of 20 to 25%.
b
The results for within-house COV have been adjusted for the fixed effect of a room’s level within a house.