Table 3.

Akaike information criterion values for the age-period, age-cohort, and age-period-cohort models against the age-drift model.^‡

Model	Hepatocellular carcinoma		Cholangiocarcinoma
	Male	Female	Male	Female
Age-period	1520.5†	1522.4	1527.6	1519.5
Age-cohort	1520.6	1522.3†	1527.7	1519.5
Age-period-cohort	1521.0	1524.4	1523.8†	1517.3†

^†The best fitting model based on the Akaike information criterion.

^‡Relative values that weight the goodness-of-fit of the model to empirical data.