Abstract Body (Do not enter title and authors here): Background: Long term follow-up data on elevated blood pressure (BP) or antihypertensive drugs in young adults are scarce. The effect of hypertension (HTN) and antihypertensive medications on the cardiovascular disease incidence in young healthy adults (20~45 years) was analyzed using a large-scale population medical use database in Korea.

Methods: In total, 4,590,597 young Korean adults without comorbidities who underwent regular health examination were included in this study. They were stratified into four groups according to their BP (optimal BP, normal BP, high normal BP, and HTN). The primary outcome was a composite of the incidence of myocardial infarction and ischemic and hemorrhagic stroke, obtained by tracking the medical use data of the first-ever ICD-10 codes. Subgroup analysis was conducted by categorizing the HTN group into two subgroups according to the prescription ratios of the antihypertensive drugs during the follow-up period.

Results: The average age was 33.8 years and median follow-up duration was 15.9 years. HTN elevated the incidence risk of major cardiovascular disease by 2.16 times compared to that of the optimal BP group. Dyslipidemia and HTN were the most dominant risk factors for myocardial infarction and stroke, respectively. In the subgroup analysis, antihypertensive medications decreased the incidence of cardiovascular disease by 70% in all diseases.

Conclusions: Cardiovascular risk factors, including HTN, contribute to major cardiovascular disease incidence in young adults. The antihypertensive medications decreased the major cardiovascular disease incidence estimates.