Table 2 Summary statistics comparing goodness of fit for different cervical cancer maximum likelihood models.

Model	Degrees of freedom	Deviance	p Value*	Adjusted R2†
Age	60	1805.2
Age drift ‡	59	270.9		0.85
Age period	55	214.6	<0.001	0.87
Age cohort	44	111.0	<0.001	0.92
Age‐period‐cohort	40	68.5		0.94

*p Values are based on the F test for comparisons between two factor model with the full age‐period‐cohort model.¹⁸ †Adjusted R² measures how much of the variability that is explained by factors other than age, taking into account the difference in the numbers of degrees of freedom.¹⁵ ‡The “drift” parameter represents a log‐linear change in rate not exclusively identifiable as a period or cohort effect.