Cost-effectiveness of population-based mammography screening strategies by age range and frequency

•We model 8 mammography screening strategies, varying screening age and frequency.•The model was built using observational data from a population-based screening program.•Biennial screening was more cost-effective than annual screening.•Screening women 40–49 years was more cost-effective than screening 70–74 year-olds.•There is potential value in reducing uncertainty around cost-effectiveness results.