Socioeconomic, clinical and nutritional factors on interdialytic weight gain in haemodialysis users

Abstract

Objectives: The study aimed to evaluate the factors associated with interdialytic weight gain in users of haemodialysis services in a metropolitan region of Brazil. Methods: This is an cross-sectional epidemiological study with 1,024 individuals with chronic kidney disease on haemodialysis in Brazil. Interdialytic weight gain was evaluated by the percentage weight gain between one haemodialysis session and another. The variables included in the binary logistic regression analysis were selected by considering p< 0.10 in the bivariate test. Results: We demonstrated that having more years of study (OR=0.537;CI 95% = 0.310–0.931; p=0.027) and be overweight (OR=0.661;CI 95% = 0.461–0.948; p=0.024) or obese (OR=0.387;CI 95% = 0.246–0.608; p=<0.001) reduced the chances of users having high interdialytic weight gain. Those who did not have paid work (OR=2.025;CI 95% = 1.218–3.365; p=0.007) and not adopting measures to reduce salt increased (OR=1.694;CI 95% = 1.085–2.645; p=0.020) increased the chances of interdialytic weight. Conclusion: The results point to an association between the increase in interdialytic weight gain and the absence of paid work and the non-adoption of measures to reduce salt intake in the diet. Therefore, the need for knowledge about these associated factors can be an important alternative for the individual targeting of this population.