Table 4.
Description of cohorts
| Characteristics | Czech (1953–1999) | French (1956–1999) | Beaverlodge (1965–1999) |
|---|---|---|---|
| Total | |||
| Lung cancer deaths | 389 | 65 | 195 |
| Person-years | 196,533 | 80,859 | 150,964 |
| Person-years at 0.0 WLMa | 28,360 | 25,384 | 18,711 |
| Mean (WLM)b | 95.5 | 36.4 | 118.5 |
| Range (WLM) | 0–363 | 0–127.7 | 0–1,617 |
| Mean exposure rate (WL) | 1.02 | 0.27 | 2.64 |
| Range (WL) | 0–5.10 | 0–7.04 | 0–29.44 |
| < 100 WLM | |||
| Lung cancer deaths | 223 | 62 | 123 |
| Person-years | 179,837 | 80,286 | 134,113 |
| Mean (WLM)b | 45.1 | 32.9 | 32.3 |
| Mean exposure rate (WL) | 0.67 | 0.27 | 1.45 |
| Range (WL) | 0–5.10 | 0–7.04 | 0–17.58 |
aIndividual number of workers with 0.0 WLM not available, only person-year tables are provided
bMean cumulative radon exposure (5-year lagged, WLM) weighted by person-years at risk