Fig. 1From: Factors influencing drug switching and changes in low-density lipoprotein-cholesterol levels with atorvastatin: a real-world observational studyStudy population flowchart. NHIS, National Health Insurance Service; LDL-C, low-density lipoprotein-cholesterol*Outlier was defined as values outside the range (Q1–1.5 IQR, Q3 + 1.5 IQR)Back to article page