Table 2 

Results of Kfunction spacetime clustering analyses for place of birth and date of birth^{a} 

ICCC^{b }Code(s) 
Disease group 
Geographical distance^{c }(Pvalues) 
NN threshold^{d }(Pvalues) 


III(a) 
Ependymoma 
^{e} 
0.49 


III(b) 
Astrocytoma 
0.79 
0.49 


III(a), III(b) 
Ependymoma and Astrocytoma 
0.88 
0.41 


III(c) 
PNET 
0.42 
0.52 


III(d) 
Other gliomas 
0.52 
0.17 


III(e), III(f) 
Other Specified and Unspecified 
0.37 
0.34 


III(af) 
All CNS tumours 
0.10 
0.14 


^{a}Cases are close in time if dates of birth differ by <t, where t is in the range 0.1 year to 1.5 year. ^{b }International Classification of Childhood Cancer. ^{c}Cases are close in space if distances between their locations differ by <s, where s is in the range 0.57.5 km. ^{d}Cases are close in space if either one is within the distance to the N^{th }nearest neighbour of the other, where N ranges from 115. ^{e}Too few cases for analysis 

McNally et al. BMC Cancer 2012 12:13 doi:10.1186/147124071213 