Table 4

Thyroid cancer risk by subtype. Thyroid scan is not used, and stratification is by sex and year of birth (<1900, 1900–1909, 1910–1919, 1920–1929, 1930–1939, 1940–1949, 1950–1959, 1960+)

Thyroid cancer subtypeERR/Gy (+95% CI)P value*Cases
Follicular−0.29 (−5.75 to 29.08)0.96419
Medullary−22.47 (−42.59 to 48.92)0.2775
Papillary4.15 (−0.39 to11.27)0.080275
Other and unclassified thyroid cancer−0.08 (−2.99 to 8.03)0.978115
  • *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.