TABLE 2

Generalized additive models for the Poisson family with a log link

ModelsResidual devianceResidual degrees of freedomChange in devianceChange in degrees of freedomP valueR2 adjusted
(1) Null model1,923.98179.00
(2) Year1,174.77172.68749.216.32<0.00010.49
(3) Year + Age582.42170.64592.352.03<0.00010.71
(4) Year + Age + Sex579.44169.642.981.000.080.71
(5) Year + Age + Sex + Year × Age135.2889.00444.1680.64<0.00010.87
(6) Year + Age + Sex + Year × Age + Year × Sex96.7460.0038.5429.000.110.87
(7) Year + Age + Sex + Year × Age + Age × Sex103.6187.0031.672.00<0.00010.91
  • The models are evaluated with the response variable being the incidence of T1D. A smooth term is estimated for the time trend and linear coefficients for age, sex, and interaction terms.