Estimated Cancer Incidence in Three Swedish Counties, 1991–2010, by Sex and Exposure Category
| Cumulative exposure, 1986–1990, 137Cs (kBq/m2)* | Individuals enrolled as of 1 January 1991 (n) | Cancer cases 1991–2010 (n) | 1991–2010, Person-years of follow-up | Incidence rate/105 | Incidence rate ratio | 95% CI |
|---|---|---|---|---|---|---|
| Males | ||||||
| 1st quartile | 91 304 | 9000 | 1 579 919 | 570 | Reference | – |
| 2nd—3rd quartiles | 181 078 | 19 045 | 3 153 482 | 604 | 1.06 | (1.03 to 1.09) |
| 4th quartile | 92 692 | 10 191 | 1 607 752 | 634 | 1.11 | (1.08 to 1.14) |
| Females | ||||||
| 1st quartile | 92 347 | 10 772 | 1 572 854 | 685 | Reference | – |
| 2nd—3rd quartiles | 186 149 | 22 212 | 3 192 657 | 696 | 1.02 | (0.99 to 1.04) |
| 4th quartile | 90 967 | 11 275 | 1 566 035 | 720 | 1.05 | (1.02 to 1.08) |
*Cumulative exposure (kBq/m2) from 1986 through 1990 in three categories; lowest, in the first quartile (0.00–45.40; reference category); intermediate, in the second and third quartiles (45.41–118.80); and highest, in the fourth quartile (118.81–564.71).