TABLE 4.
Adjusted odds ratio for lung cancer and 95% confidence interval by residential radon concentration category for Worchester County, Massachusetts study of Thompson et al. (2008)
| Radon Concentration in Bq m−3 [pCi L−1]a | Adjusted Odds Ratio (95% Confidence Interval) p value relative to odds ratio = 1 |
|---|---|
| < 25 [< 0.7 (rounded)] | 1.0 (reference group) |
| 25 − < 50 [0.7 − 1.4] | 0.53 (0.24, 1.13), p ≤ 0.1 |
| 50 − < 75 [1.4 − 2.0] | 0.31 (0.13, 0.73), p ≤ 0.05 |
| 75 − 150 [2.0 − 4.1] | 0.47 (0.2, 1.10), p ≤ 0.1 |
| 150 − < 250 [4.1 − 6.8] | 0.22 (0.04, 1.13), p ≤ 0.1 |
| ≥ 250 [> 6.8] | 2.50 (0.47, 13.46) |
a
Environmental Protection Agency Action Level = 4 pCi L−1.