LAUSR

Objectives: Dietary high sodium and low potassium intake is common in China. The aim of Our Study was to explore the relationship between urinary sodium to potassium ratio and arterial stiffness in Chinese living in nursing houses. Methods: The participants were living in nursing houses in the Northern China. Item survey included questionnaire, physical examination, blood and spot urine sample collection. Arterial stiffness was evaluated by measuring the carotid-femoral PWV (cfPWV) with the Boso ABI system-100 automatic device. Results: Totally 309 people (men 256, women 53) with complete data were used for analysis. The mean age was 73.1 ± 11.1, mean of spot urinary sodium to potassium ratio (U Na/K) was 3.60 ± 2.50. Partial correlation analysis controlling with age showed that SBP (r = 0.464, P < 0.001), DBP (r = 0.420, P < 0.001), U Na/K (r = 0.150, P < 0.015) were positively correlated with cfPWV. In multiple linear regression analysis, cfPWV was as a dependent variable, age, sex, BMI, SBP, DBP and U Na/K were as independent variables. It was found that age, SBP, glucose and U Na/K was significantly positively correlated with cfPWV (see table) Conclusion: The results suggested that urinary Na/K is an independent risk factor of arterial stiffness, reduce dietary sodium and increase potassium intake might be able to improve blood vessel compliance.