TABLE 1.
Characteristics of the Colorado Plateau Uranium Miners Cohort at Study Entry (n = 4,134)
| Characteristica | |
|---|---|
| Age | 33 (25–43) |
| Calendar year | 1958 (1955–1958) |
| White; no. (%) | 3,358 (81) |
| Smoked; no. (%) | |
| Never | 962 (23) |
| Ever | 3,165 (77) |
| Missing | 10 (<1) |
| Radon exposure prior to study entry | |
| Previously exposed; no. (%) | 3,899 (94) |
| Working-level monthb | 154 (51–485) |
a
Median (interquartile range), unless otherwise noted.
b
Working-level months of cumulative prior radon exposure among previously exposed miners.