Description of the whole UKAEA cohort with a breakdown into those individuals who were in the original mortality study and the new individuals who were recruited since 1979, or who were employed at Risley
| In original cohort | New individuals | Whole cohort | |
|---|---|---|---|
| Total number of subjects | 37527 | 13840 | 51367 |
| Dead on 31 Dec 1997 | 9828 | 421 | 10249 |
| Deaths from cancer | 2776 | 180 | 2956 |
| Deaths from other causes | 7052 | 241 | 7293 |
| Not flagged for follow up | – | – | 989 |
| Emigrated | 1657 | 199 | 1856 |
| Women | 10267 | 4633 | 14900 |
| Radiation workers | 21156 | 5239 | 26395 |
| Mean year of birth | 1931 | 1955 | 1937 |
| Mean age at hire | 29.9 | 26.5 | 29.0 |
| Mean duration of employment | 10.8 | 7.7 | 10.0 |
| Mean duration of follow up | 31.0 | 15.1 | 26.7 |
| Total external dose (man.Sv) | 911.2 | 58.8 | 970 |
| Mean annual dose (mSv) | 4.26 | 1.57 | 3.95 |
| Mean cumulative dose (mSv) | 43.07 | 11.22 | 18.88 |
| Person-years at risk | 1161799 | 209354 | 1371153 |