Analysis of the Relationship between Adult Asthma and Stroke: A Longitudinal Follow-Up Study Using the Korean National Sample Cohort

Figure 1

A schematic illustration of the participant selection process that was used in the present study. Out of a total of 1,125,691 participants, 117,364 of asthma participants were matched with 117,364 control participants by age, group, sex, income group, region of residence, and past medical histories.