Abstract:
BACKGROUND AND AIM:Hyponatremia is associated with development of hepatic encephalopathy (HE), but the nature of the relationship between serum sodium and HE incidence is unknown. We examined the association between serum sodium, changes in serum sodium, and HE incidence using data from three randomized trials of satavaptan in cirrhosis patients with ascites. METHODS:During follow-up, patients were examined for HE, and serum sodium was measured regularly. We used fractional polynomials to estimate the nature of the association between current serum sodium and hazard rate of HE (e.g. with a linear, logarithmic, or exponential slope) and Cox regression to adjust for confounders. Moreover, we examined the association between serum sodium at inclusion and 30-day and 1-year cumulative risk of HE. Finally, we examined the effect of "change in serum sodium since inclusion" on the hazard rate of HE. RESULTS:We included 1116 patients of whom 302 developed HE. Median serum sodium at inclusion was 137 (interquartile range, 134-139). The lower the current serum sodium, the higher the rate of HE. Specifically, the confounder-adjusted HE hazard rate increased linearly by 8% (adjusted hazard ratio = 1.08, 95% confidence interval: 1.06-1.10) for every mmol/L decrease in serum sodium over the range of measured values. Current serum sodium had a stronger effect on the HE rate than the changes in serum sodium since inclusion. CONCLUSION:The hazard rate of HE development increased by 8% for every mmol/L decrease in serum sodium. Further, current serum sodium had a stronger effect on the HE rate than changes in serum sodium.
journal_name
J Gastroenterol Hepatoljournal_title
Journal of gastroenterology and hepatologyauthors
Bossen L,Ginès P,Vilstrup H,Watson H,Jepsen Pdoi
10.1111/jgh.14558subject
Has Abstractpub_date
2019-05-01 00:00:00pages
914-920issue
5eissn
0815-9319issn
1440-1746journal_volume
34pub_type
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