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. Author manuscript; available in PMC: 2018 Mar 15.
Published in final edited form as: Int J Cancer. 2017 Mar 15;140(6):1260–1269. doi: 10.1002/ijc.30544

Table 5.

Linear ERR per Gy and 90% confidence intervals (CI) by age at exposure (AE) and time since exposure (TSE).1,2

Outcome AE (years) TSE (years) Heterogeneity (LRT p-value, 8 df)3

2<10 10<20 20+
All solid cancers <35 -0.88 (NC, 6.53) 0.54 (-2.27, 4.14) -0.77 (-1.56, 0.11) 0.682
35<50 1.25 (-1.26, 4.23) 0.74 (-0.60, 2.20) 0.75 (0.03, 1.42)
50+ 0.01 (-1.44, 1.61) 0.74 (-0.30, 1.91) 0.27 (-0.75, 1.44)

Leukemia excl. CLL <35 16.56 (NC, 52.6) 8.11 (NC, 35.86) 2.86 (-3.42, 11.44) 0.064
35<50 0.93 (NC, 11.19) -13.09 (NC, -2.0) 5.11 (0.07, 11.37)
50+ -6.66 (-10.69, 3.16) 6.65 (-2.96, 20.72) 8.75 (1.04, 20.66)
1

Extrapolating estimates to 1Gy resulted in artefactual values (i.e., ERR per Gy <-1) for some outcomes. These estimates are shown for completeness only.

2

Profile-likelihood confidence intervals calculated with 1 df.

3

Compared to a model where all parameters are equal.

Abbreviations: AE, age at exposure; CI, confidence interval; CLL, chronic lymphocytic leukemia; df, degrees of freedom; ERR, excess relative risk; LRT, likelihood ratio test; NC, not calculable; TSE, time since exposure.