Causes and Consequences of Interdialytic weight gain

Area of Science:

• Nephrology
• Clinical Nutrition
• Cardiovascular Health

Background:

• Interdialytic weight gain (IDWG) is linked to increased blood pressure and mortality in hemodialysis patients.
• IDWG is increasingly recognized as an indicator of nutritional status.

Purpose of the Study:

• To investigate associations between patient factors, nutritional parameters, and IDWG.
• To identify key predictors of IDWG in prevalent adult hemodialysis patients.

Main Methods:

• Data collected over one week on IDWG and hemodynamic parameters from 138 adult hemodialysis patients.
• Multivariate linear regression analysis used to identify factors associated with IDWG.

Main Results:

• Higher %IDWG associated with younger age, greater height/weight, absence of diuresis, and lower postdialysis sodium.
• Patients in the highest IDWG tertile were younger, more often male, and had higher subjective global assessment scores (SGA).
• The model explained 37% of the variance in %IDWG.

Conclusions:

• Key factors associated with %IDWG include age, height, weight, diuresis, and postdialysis sodium levels.
• Patients with the highest IDWG exhibit significantly higher diastolic blood pressures.