Age-period-cohort analysis with a constant-relative-variation constraint for an apportionment of period and cohort slopes.

ABSTRACT: Age-period-cohort analysis of incidence and/or mortality data has received much attention in the literature. To circumvent the non-identifiability problem inherent in the age-period-cohort model, additional constraints are necessary on the parameters estimates. We propose setting the constraint to reflect the different nature of the three temporal variables: age, period, and birth cohort. There are two assumptions in our method. Recognizing age effects to be deterministic (first assumption), we do not explicitly incorporate the age parameters into constraint. For the stochastic period and cohort effects, we set a constant-relative-variation constraint on their trends (second assumption). The constant-relative-variation constraint dictates that between two stochastic effects, one with a lar

SUBMITTER: Su SY 

PROVIDER: S-EPMC6922428 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature