Table 2

Poisson regression model fit and tests on model terms

Model fitMale subjectsFemale subjects
Akaike information criterionLack-of-fit P valueAkaike information criterionLack-of-fit P value
 Model 1: age616.6<0.0001521.8<0.0001
 Model 2: age + drift495.3<0.0001412.0<0.0001
 Model 3: age + period482.6<0.0001402.7<0.0001
 Model 4: age + cohort326.20.07312.20.06
 Model 5: age + cohort + period329.10.05313.10.09
Test on model terms*Likelihood ratio testLikelihood ratio test
χ2dfP valueχ2dfP value
Drift | age (2 vs. 1)123.31<0.0001111.81<0.0001
Period | age, drift (3 vs. 2)18.730.000315.330.002
Cohort | age, drift (4 vs. 2)187.19<0.0001117.89<0.0001
Period | age, cohort (5 vs. 4)3.130.375.230.16
Cohort | age, period (5 vs. 3)171.59<0.0001107.79<0.0001
  • df, degrees of freedom.

  • *A | B denotes A added to a model containing B.