Table 3

Results of K-function space-time clustering analyses for place of birth and date of diagnosisa

ICCCb code(s)

Disease group

Geographical distancec (P-values)

NN thresholdd (P-values)


III(a)

Ependymoma

e

0.51


III(b)

Astrocytoma

0.26

0.46


III(a), III(b)

Ependymoma and Astrocytoma

0.41

0.77


III(c)

PNET

0.10

0.21


III(d)

Other gliomas

0.43

0.39


III(e), III(f)

Other Specified and Unspecified

0.85

0.36


III(a-f)

All CNS tumours

0.53

0.48


aCases are close in time if dates of diagnosis differ by <t, where t is in the range 0.1 year to 1.5 year.

b International Classification of Childhood Cancer.

cCases are close in space if distances between their locations differ by <s, where s is in the range 0.5-7.5 km.

dCases are close in space if either one is within the distance to the Nth nearest neighbour of the other, where N ranges from 1-15.

eToo few cases for analysis.

McNally et al. BMC Cancer 2012 12:13   doi:10.1186/1471-2407-12-13

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