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World J Nephrol. Jun 25, 2026; 15(2): 118360
Published online Jun 25, 2026. doi: 10.5527/wjn.v15.i2.118360
Published online Jun 25, 2026. doi: 10.5527/wjn.v15.i2.118360
Bioelectrical impedance analysis for assessing hydration status in patients undergoing maintenance hemodialysis
Geovanna L S Borges, Luana R Mendes, Isadora C Trombim, Barbara P Vogt, Nutrition, Federal University of Uberlândia, Uberlandia 38405-320, Minas Gerais, Brazil
Cassiana R Goes, Nutrition, Federal University of Viçosa, Rio Paranaíba 38810-000, Minas Gerais, Brazil
Co-first authors: Geovanna L S Borges and Luana R Mendes.
Author contributions: Borges GLS contributed to visualization; Borges GLS, Mendes LR, and Vogt BP contributed to formal analysis, interpretation of data, writing - original draft; Trombim IC contributed to data acquisition; Trombim IC and Goes CR contributed to writing - review and editing; Goes CR and Vogt BP contributed to design of the work, supervision; Borges GLS and Mendes LR contributed equally to this manuscript and are co-first authors. All authors have approved this submission, read and approved the final manuscript.
Institutional review board statement: This study protocol was reviewed and approved by the Research Ethics Committee of the Federal University of Uberlandia. The procedures used in this study adhere to the tenets of the Declaration of Helsinki.
Informed consent statement: All study participants provided their informed written consent to participate prior to study enrollment.
Conflict-of-interest statement: All the authors report no relevant conflicts of interest for this article.
STROBE statement: The authors have read the STROBE Statement-checklist of items, and the manuscript was prepared and revised according to the STROBE Statement-checklist of items.
Data sharing statement:
The datasets generated and/or analyzed during the current study are available from the corresponding author upon reasonable request.
Corresponding author: Barbara P Vogt, PhD, Adjunct Professor, Nutrition, Federal University of Uberlândia, Avenida Pará 1720, Umuarama Campus, Uberlandia 38405-320, Minas Gerais, Brazil. barbaravogt@ufu.br
Received: January 6, 2026
Revised: February 4, 2026
Accepted: March 9, 2026
Published online: June 25, 2026
Processing time: 167 Days and 6.7 Hours
Revised: February 4, 2026
Accepted: March 9, 2026
Published online: June 25, 2026
Processing time: 167 Days and 6.7 Hours
Core Tip
Core Tip: Adequate hydration status is a concern in patients undergoing hemodialysis, as fluid overload increases the risk of complications and mortality. In our study, we evaluated hydration status before and after the hemodialysis session using data provided by bioelectrical impedance. Hydration status was classified according to the three indices: Overhydration (OH), OH/extracellular water, and extracellular water/body weight. The OH index was the most effective in detected more patients with fluid overload before and after the dialysis session, showed better correlation with hydration parameters provided by bioimpedance, blood pressure, and N-terminal pro-brain natriuretic peptide.