Table 2 Analysis of deviance in the unconditional logistic regression for the risk of leukaemia or non-Hodgkin lymphoma to children under 5 years of age, showing the deviance contribution for each term, distributed approximately as chi-squared with the stated number of degrees of freedom

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

Source of variation

d.f.

Deviance

P -value

Residual d.f.

Residual deviance

Null

   

27 377

36 564

Age at diagnosis (years)

4

1533.4

∼ 0

27 373

35 031

Region of residence

9

25.95

0.002

27 364

35 005

Birth quinquennium

9

22.52

0.007

27 355

34 982

Father’s occupation group

6

19.67

0.003

27 349

34 963

Proximity

1

0.93

0.335

27 348

34 962

  1. Abbreviations: d.f.=degrees of freedom; NPPs=nuclear power plants.
  2. Proximity is the reciprocal of the distance from address at diagnosis to the nearest of 13 NPPs; for the analysis with 14 NPPs, the proximity deviance reduction is 0.09.
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