Thyroid cancer risk by period of dose latency
| Latent period (years) | ERR/Gy (+95% CI) | P value* |
| Excluding thyroid scan doses | ||
| 0 | 2.10 (−0.97 to 6.66) | 0.216 |
| 5 | 2.29 (−0.91 to 7.01) | 0.191 |
| 10 | 2.49 (−0.89 to 7.43) | 0.174 |
| 15 | 3.00 (−0.74 to 8.45) | 0.133 |
| Including thyroid scan doses | ||
| 0 | 1.69 (0.81 to 2.83) | <0.001 |
| 5 | 1.66 (0.78 to 2.81) | <0.001 |
| 10 | 1.55 (0.66 to 2.73) | <0.001 |
| 15 | 1.49 (0.54 to 2.75) | <0.001 |
Stratification is by sex and year of birth (<1900, 1900–1909, 1910–1919, 1920–1929, 1930–1939, 1940–1949, 1950–1959, 1960+).
*P value for improvement in fit compared with null model, that is, significance of the departure of the ERR/Gy from 0.
ERR, excess relative risk coefficient.