“…Except the drug side effects, many other factors are also found to be associated with the low compliance of aET (Hadji et al, 2013;Sawesi et al, 2014;Cahir et al, 2015;Farias and Du, 2017). Given that the medication compliance is a complex and dynamic behavior, it is associated with many aspects such as patient demographic and socio-economic status, patient comorbidity, and patient daily performance, other therapy-related adverse or efficacy, and others (Sawesi et al, 2014;Chirgwin et al, 2016;Farias and Du, 2017;Moon et al, 2017;Paranjpe et al, 2019;Wassermann et al, 2019;Clancy et al, 2020;Hwang et al, 2020). Farias and Du (2017) analyzed 8,688 Medicare BC patients, and found that 36.8% patients were non-adherent to aET, and the racial/ ethnic disparities in aET adherence could be largely explained by women's differences in socioeconomic status and out-of-pocket medication costs.…”