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Table 2 The results of Poisson regression age-period-cohort models for NPC incidence in Sihui County, Guangdong Province, South China from 1987 to 2011

From: Incidence trend of nasopharyngeal carcinoma from 1987 to 2011 in Sihui County, Guangdong Province, South China: an age-period-cohort analysis

Variable Sex DF Deviance Deviance/DF
Age Male 36 50.38 1.40
  Female 36 42.67 1.19
Period Male 40 290.03 7.25
  Female 40 114.45 2.86
Cohort Male 32 151.03 4.72
  Female 32 57.77 1.80
Age-period Male 32 46.36 1.45
  Female 32 39.89 1.25
Age-cohort Male 24 31.97 1.33
  Female 24 23.50 0.98
Period-cohort Male 28 100.57 3.59
  Female 28 46.23 1.65
Age-period-cohort Male 21 28.70 1.37
Female 21 20.55 0.98
  1. DF, degree of freedom.