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Sodium intake affects urinary albumin excretion especially in overweight subjects
J C Verhave1, H L Hillege, J G M Burgerhof
1Division of Nephrology, Department of Medicine, University Medical Center Groningen, Groningen University Institute of Drug Exploration (GUIDE), Hanzeplein 1, 9713 GZ Groningen, The Netherlands.
Objectives:
To examine the relationship between sodium intake and urinary albumin excretion, being an established risk marker for later cardiovascular morbidity and mortality.
Design:
Cross-sectional cohort study using linear regression analysis. Setting. University hospital outpatient clinic.
Subjects:
A cohort drawn from the general population, consisting of 7850 subjects 28-75 years of age, all inhabitants of the city of Groningen, the Netherlands. The cohort is enriched for the presence of subjects with elevated urinary albumin concentration.
Results:
The results show a positive relationship between dietary sodium intake and urinary albumin excretion. The association was independent of other cardiovascular risk factors (such as sex, age, blood pressure, body mass index (BMI), waist-to-hip ratio, serum cholesterol, plasma glucose and smoking) and other food constituents (calcium, potassium and protein). The relationship between sodium intake and urinary albumin excretion was steeper in subjects with a higher BMI compared with a lower BMI.
Conclusions:
Sodium intake is positively related to urinary albumin excretion. This relation is more pronounced in subjects with a higher BMI. These results suggest that high sodium intake may unfavourably influences cardiovascular prognosis especially in overweight and obese subjects.
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