Table 3.

Dose effect modification: baseline depends on city, in-city status, age ATB, and attained age

PremenarcheBetween menarche and first birthPost–first birth
RR (95% CI)*RR (95% CI)*RR (95% CI)*
ERR model
    ERR/Gy (e = 30, a = 70)1.31 (0.36-3.58)2.36 (1.12-4.13)1.1 (0.41-2.70)
    Age ATB0% (−39 to 63%)
    Attained age−0.64 (−2.3 to 0.97)
EAR model
    EAR/Gy (e = 30, a = 70)9.56 (2.91-24.6)19.10 (10.02-31.0)2.82 (1.71-3.92)
    Age ATB−44% (−64 to −13%)
    Attained age2.82 (1.71-3.92)
  • *95% CI calculated from the profile likelihood for hazard ratios and ERR and EAR per Gy terms and from Wald's method for age at exposure and attained age terms.

  • Age ATB (change/decade) and attained age (power) effects assumed equal for all reproductive status ATB categories.