Subjects’ Selection
We identified 7,372 patients who were dispensed either atorvastatin 40mg (n=7,009) or 80mg (n=363) through the Heart Hospital electronic pharmacy record system during the study period (i.e. 1 January 2017 to 31 December 2018), suggesting that atorvastatin 40mg is more commonly prescribed than atorvastatin 80mg at our facility. Upon screening the potentially eligible patients above, 626 fulfilled the study’s eligibility criteria and classified into two: 475 (75.9%) in the atorvastatin 40mg group and 151 (24.1%) in the atorvastatin 80mg group.