Table 7

 Age standardised thyroid cancer (ICD 7 194) incidence per 100000 person years (105 py) in ages 5–59 years, directly standardised incidence rate ratios (SIRR), and standardised incidence rate differences per 100000 person years (SIRD) with 95% confidence intervals (95% CI). European population restricted to ages 5–59 years is used as the standard

Exposure kBq Cs-137/m21986–19871988–19961988–1996 minus 1986–1987
Cases (n)Incidence per 105 pySIRR (95% CI)Cases (n)Incidence per 105 pySIRR (95% CI)SIRD per 105 py (95% CI)
<3192.671.00 (reference for all SIRR)682.230.83 (0.50 to 1.40)−0.44 (−0.90 to 0.02)
3–29242.430.91 (0.49 to 1.67)1032.320.87 (0.53 to 1.43)−0.11 (−0.51 to 0.30)
30–3942.300.86 (0.29 to 2.56)182.330.87 (0.45 to 1.68)0.03 (−0.53 to 0.60)
40–12061.840.69 (0.27 to 1.74)221.550.58 (0.31 to 1.08)−0.29 (−0.93 to 0.35)
Total53211