Figure 3

Butterfly chart of the population structures. Blue represents the proportion of males, while orange signifies the proportion of females. Left, population structure of the National Health Insurance Service (NHIS) dataset, which represents the national distribution of individuals who underwent healthcare screening. Middle, population structure of the crude Chonnam National University Hwasun Hospital (CNUHH) dataset. Right, population structure of age/sex adjusted for the CNUHH dataset.