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Table 4 Analyses of temporal clustering of neuroblastic tumours at ages 18 months to 19 years

From: Temporal clustering of neuroblastic tumours in children and young adults from Ontario, Canada

Type of analysis

^β1 (SE)

One-sided p value

Within months

Within quarters

Within years

Within full period

Between fortnights

−0.11 (0.17) p = 0.738

− 0.14 (0.07) p = 0.979

− 0.08 (0.95) p = 0.933

−0.06 (0.05) p = 0.867

Between months

 

−0.20 (0.11) p = 0.968

−0.11 (0.08) p = 0.926

− 0.07 (0.07) p = 0.827

Between quarters

  

0.02 (0.15) p = 0.443

0.18 (0.13) p = 0.064

Between years

   

0.64 (0.27) p = 0.018

  1. 1 ^β is the one-step estimate of β, the extra-Poisson variation, calculated in the same way as originally described by Muirhead [16]