Impact of Interdialytic Weight Gain (IDWG) on Nutritional Parameters, Cardiovascular Risk Factors and Quality of Life in Hemodialysis Patients

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Introduction. The amount of interdialytic weight gain (IDWG) considering body weight is of great importance in hemodialysis patients. In general practice, patients are asked to get standard weight between two hemodialysis sessions. However, it should be individualized considering patient’s weight. We aimed to determine the association between the IDWG and the nutritional parameters, cardiovascular risk factors, and quality of life.

Methods. Thrity-two patients receiving hemodialysis at least for one year were enrolled into the study. Patients were monitored for 12 consecutive hemodialysis sessions; and the arithmetic mean of IDWG was calculated. IDWG% was calculated in accordance with patients’ dry weight. Data of patients with IDWG<3% (Group I) and IDWG≥3 (Group II) were compared. Sociodemographic variables, laboratory, anthropometric measurements, blood pressure, left ventricular mass index, Subjective Global Assessment Scale and SF-36 Quality of Life Scale were applied to evaluate the patients.

Results. 59.4% (n=19) and 40.6% (n=13) of patients were included in Group I and Group II, respectively. In Group II, albumin (p=0.02), potassium (p=0.02), phosphorus (p=0.04), nPCR (p=0.03), physical function (p=0.04), role limitations caused by physical problems (p=0.04), general health (p=0.03), physical quality of life (p=0.04) scores were significantly higher. A significant correlation was detected between IDWG and physical and mental quality of life, total score SF-36, albumin, total protein and the potassium values.

Conclusions. Patients with an IDWG ≥ 3% have better nutritional parameters and quality of life scales. The limiting of IDWG to 1-2 kg, ingoring patient weight may give rise to malnutrition and a reduced quality of life.

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