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QALY x Value per statistical life year (VPSLY). Our calculations use the lower end of the range for estimated value per statistical life year. (Tolley, G., Kenkel, D., & Fabian, R. (1994). Valuing health for policy: An economic approach. Chicago: University of Chicago Press.)

The QALY (Quality adjusted life year) is a commonly used by public health researchers that not only incorporates the years of life span extension from an intervention, but also the quality of life, based on individuals preferences over different health states. The methods uses to estimate QALYs associated with the interventions included in our model can be found here: https://pubmed/ncbi.nlm.nih.gov/16777543/ The Quality Adjusted Life Year calculation includes all clinics that provided detailed information about the number of people who received certain preventive healthcare services in the last 5 years. For details assumptions, see Oriol, et al. 2009 https://bmvmedicine.biomedcentral.com/articles/10.1186/1741-7015-7-27

Unnecessary emergency department visits avoided.