Plain-English translation of NCT04186078 on ClinicalTrials.gov ↗ · Source last updated · Translation generated · How we translate trials
This is a research study that follows people who have symptoms of sleep apnea—a condition where breathing stops and starts during sleep—to understand how common it is in Korea and how it affects people's health over time. Researchers will ask about your symptoms, perform a sleep test to measure your breathing patterns, and track your health regularly. If you agree, they may also collect a blood sample to store for future research.
Sleep apnea is a very common condition that can cause serious health problems, but doctors don't fully understand how it develops or affects different populations. This study aims to fill that gap by carefully tracking patients' symptoms, test results, and health outcomes so they can better understand and treat sleep apnea in Korea.
You likely qualify if…
You likely don't qualify if…
You will visit Seoul National University Hospital's outpatient clinic and have a sleep test (polysomnography or respiratory polygraphy) to measure your breathing during sleep. If the test shows you have sleep apnea, you will be asked to return for regular follow-up visits to track how you're doing. If you don't have sleep apnea, you'll have one baseline visit only. You may also be asked to donate a blood sample for research storage, which is optional.
AI-generated summary from trial data · Jun 9, 2026 · Not medical advice
South Korea
Enrollment target
~1,000 participants
Started
November 2019
Primary completion
December 2045
Age range
19 Years and older
Last updated on clinicaltrials.gov in April 2026.
Reach out to the team running this trial. Response times vary — some teams are faster than others.
Central contact
Jaeyoung Cho, M.D.
Seoul National University Hospital
Tell us you're interested and we'll help connect you with the research team. We'll walk you through what to expect first — no email needed to get started.