Abstract
The aim of the present study was to assess the relationship between interdialytic weight gain (IDWG) and nutrition markers in hemodialysis (HD) patients, by means of repeated measures analysis. The records of 255 patients, who had recently received conventional HD for a minimum of 1 year, were retrospectively reviewed. Nutrition markers, including serum albumin, serum phosphate, blood urea nitrogen, and creatinine, were recorded at monthly intervals and subjected to repeated measures analysis. Patients with higher IDWG/dry weight (IDWG%) (>5%) had significantly lower body mass index throughout the study. Repeated measures analysis of variance indicated no significant difference in these nutrition markers for patients with different IDWG%. At the end of the study, neither IDWG nor IDWG% were found to be associated with albumin or phosphate, on linear regression analysis. There was no evidence of better nutrition in new HD patients with higher IDWG%. Although increased intake is promoted as critical for improving nutritional status in HD patients, it may be inappropriate to focus solely on the benefits of higher IDWG%, which can also lead to the development of hypertension, left ventricular hypertrophy, and intradialytic hypotension.
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