Table 4 Numbers of cases of LNHL and controls aged 0–4 years within given distance bands from the nearest of 13 NPPs, with odds ratios relative to the outer (>25 km) region and 95% confidence intervals computed using the normal approximation to the distribution of log(OR)

From: Leukaemia in young children in the vicinity of British nuclear power plants: a case–control study

  Address at birth   95% Confidence interval Address at diagnosis   95% Confidence interval
Distance (km) Cases Controls Odds ratio Lower Upper Cases Controls a Odds ratio Lower Upper
0–5 10 (14) 14 (14) 0.72 0.32 1.61 13 (17) 25 (26) 0.82 0.42 1.60
5–10 46 (50) 51 (54) 0.90 0.61 1.35 44 (48) 83 (89) 0.83 0.58 1.20
10–25 389 (399) 367 (380) 1.06 0.92 1.23 394 (402) 694 (710) 0.89 0.79 1.01
>25 9376 (9358) 9389 (9373) 1.00 10 167 (10 151) 15 958 (15 935) 1.00
Total 9821 9821 10 618 16 760
  1. Abbreviation: LNHL=leukaemia and non-Hodgkin lymphoma.
  2. aControls’ in the analysis of diagnosis proximity are children with non-LNHL cancers. In brackets are the frequencies that include Calder Hall (Sellafield) among the plants.