1053 Estimated dietary sodium intake among adults in Korean general population by 24 hour urine samples

Abstract

Objectives: Korean government has started sodium intake reduction policy since 2005. The present study was performed to test the feasibility of 24 urine collection method and List-assisted random-digit dialing method (LARDD) in a population based survey (granted by Korea FDA, 11162KFDA162, NCT01438619). Methods: Representative population (aged 20 between 65 years) was selected by LARDD from a city with one million population. Sodium and potassium intake (24HUNa, 24HUK, respectively) were measured with 24 hour urine collection. Out of 1623 telephone interviews, 496 adults (30.6%, age range 20 - 65 years) were recruited by LARDD. Results: Of those recruited, 368 subjects completed 24 hour urine sampling, determined by creatinine method. The estimated mean 24HUNa was 166.4 mmol/day, much lower than 208.2 mmol estimated at 1988 (INTERSALT). 24HUNa was highest in population aged 30 to 49 years, and decreased after 50 years. Men had higher 24HUNa than women (182.0 vs. 151.4 mmol/day). The estimated sodium intake is higher than that reported from UK, Scotland, and Finland, and similar to that of Spain. In contrast to 24HUNa, 24HUK was increasing continuously as age increasing, which is different from low potassium intake of population above 50 years in national health survey 2009. Conclusion: In the estimation of sodium intake, 24 hour urine collection method is feasible, and enables comparing sodium intake to the other countries. High sodium intake is a significant problem in population below 50 years, although potassium intake in elderly subjects is high.