Table 2.

Goodness of fit for the age-period-cohort models of cervical cancer incidence and mortality in Korea

Model	Incidence				Mortality
	df	Log-likelihood	AIC	p-valuea)	df	Log-likelihood	AIC	p-valuea)
Age	39	–2,888.1	111.6	< 0.01	39	–1,294.2	50.3	< 0.01
Period	48	–20,333.4	782.2	< 0.01	48	–13,631.6	524.4	< 0.01
Cohort	36	–4,478.8	172.9	< 0.01	36	–650.0	25.6	< 0.01
Age+period	36	–927.1	36.3	< 0.01	36	–608.0	24.0	< 0.01
Age+cohort	24	–257.8	11.0	0.02	24	–224.2	9.7	< 0.01
Period+cohort	33	–4,407.7	170.3	< 0.01	33	–612.8	24.3	< 0.01
Age+period+cohort (intrinsic estimator)	22	–253.9	10.9		22	–218.2	9.5

df, degrees of freedom; AIC, Akaike information criterion.

^a)p-values were calculated using the likelihood ratio test.