Abstract P349: Dietary Sodium Intake according to the Hypertension Management Status: The Fourth Korea National Health and Nutrition Examination Survey.

Introduction : High sodium intake is an established risk factor for hypertension and cardiovascular diseases. The average sodium intake in Koreans was estimated at 4,645mg/day, which was more than two times compared to the recommended amount, 2000mg/day. We assessed whether people who diagnosed with hypertension or treated for hypertension consume less sodium than those without hypertension. Methods : The present study analyzed data from a total of 6,577 Koreans (3,816 women and 2,761 men) aged 40 years and older, participated in the Korea National Health and Nutrition Examination Survey (KNHANES IV, 2007-2008). Participants were classified into five groups as follows: normal blood pressure, pre-hypertension, hypertension without treatment, hypertension with treatment, and hypertension with complications. The association between sodium intake and hypertension management status was estimated using exponential regression coefficient, adjusted for potential confounders including age, energy intake, body mass index, income, education, marriage, occupation, the frequency of eating out and effort to lower sodium intake. Results : In women, the median sodium intake tended to decrease according to the following groups; 3,708mg in normal blood pressure, 3,515mg in pre-hypertension, 3,191mg in hypertension without treatment, 3,113mg in hypertension with treatment, and 2,862mg in hypertension with complications (P for trend < 0.001). In men, a similar trend was shown, but sodium consumption was the highest in the prehypertension group; 5,099mg in normal blood pressure, 5,353mg in pre-hypertension, 5,118mg in hypertension without treatment, 4,708mg in hypertension with treatment, and 3,798mg in hypertension with complications (P for trend < 0.001). After controlling for potential confounders (energy intake, body mass index, occupation, the frequency of eating out), the trend was not significant both in women (P for trend= 0.887) and men (P for trend=0. 204). Only in men with prehypertension, sodium intake was 1.08 times higher than that in normal blood pressure group (P = 0.025). Conclusions : The present study showed that Korean women and men consumed sodium more than the recommended amount regardless of the presence of, the treatment for, or knowing the complications of hypertension. Moreover, men with prehypertension consumed the highest amount of sodium.