age at entry, age at measurement, and decade of entry are confounded by __________. how is age at entry associated with age at measure effect age at entry does age affect time since entry what is the relationship between age at measurement and age at entry on apc age at entry age at measurement age at entry and age at measurement how does age at entry affect the model age at entry and decade of entry are confounded by what variable age at entry and age at measurement what is the effect of the age-period cohort in a apc? age at entry and age at measurement apc age at entry and age at measurement relationship age at entry vs age at measurement age-period interaction in longitudinal analysis age at entry effect age at entry correlation model how age vs age at measurement work age at entry effect age-period interaction