Kidney Week

Abstract: FR-PO1111

Nutritional Status and Body Composition Assessment in Patients on Peritoneal Dialysis at a Northern Mexico Center

Session Information

• Home Dialysis: Modalities, Barriers, Utilization, and Clinical Outcomes
  October 23, 2026 | Location: Exhibit Hall A, Convention Center
  Abstract Time: 10:00 AM - 12:00 PM

Category: Dialysis

• 802 Dialysis: Home Dialysis and Peritoneal Dialysis

Authors

• Flores, Irma Isabel, Universidad Autonoma de Nuevo Leon, San Nicolás de los Garza, N.L., Mexico

Irma Isabel Flores, MD

• Arteaga Muller, Giovanna Y., Universidad Autonoma de Nuevo Leon, San Nicolás de los Garza, N.L., Mexico

Giovanna Y. Arteaga Muller, MD

• Hernandez Francisco, Heidi Daniela, Universidad Autonoma de Nuevo Leon, San Nicolás de los Garza, N.L., Mexico

Heidi Daniela Hernandez Francisco, MD

• Rodríguez Cerda, Tanya Paola, Universidad Autonoma de Nuevo Leon, San Nicolás de los Garza, N.L., Mexico

Tanya Paola Rodríguez Cerda, MD

• Verdines-Pérez, Adrian Manuel, Universidad Autonoma de Nuevo Leon, San Nicolás de los Garza, N.L., Mexico

Adrian Manuel Verdines-Pérez, MD

• Carrillo Martínez, Kenia, Universidad Autonoma de Nuevo Leon, San Nicolás de los Garza, N.L., Mexico

Kenia Carrillo Martínez, MD

• Flores Mendoza, Allina Primavera, Universidad Autonoma de Nuevo Leon, San Nicolás de los Garza, N.L., Mexico

Allina Primavera Flores Mendoza, MD

• Guerrero Gonzalez, Elisa Maria, Universidad Autonoma de Nuevo Leon, San Nicolás de los Garza, N.L., Mexico

Elisa Maria Guerrero Gonzalez, MD

• Olivo Gutierrez, Mara Cecilia, Universidad Autonoma de Nuevo Leon, San Nicolás de los Garza, N.L., Mexico

Mara Cecilia Olivo Gutierrez, MD

Background

Malnutrition and inflammation negatively impact survival in peritoneal dialysis (PD) patients. We evaluated nutritional status using the Malnutrition Inflammation Score (MIS), biochemical parameters, and bioimpedance analysis (BIA) to identify associations with actual body composition.

Methods

A cross-sectional study was conducted including 42 patients from a tertiary care center. Nutritional assessment (MIS), laboratory parameters (albumin, iron kinetics, ESR, CRP), and BIA measurements (dry weight and free water) were obtained in patients with more than one month on PD therapy. Pearson correlation analysis was performed.

Results

The cohort had a mean age of 53 ± 12 years and was predominantly male (61.9%). Diabetic nephropathy was the leading cause of CKD (71.4%). Mean BMI was 25.19, and residual urine output was preserved at 1070 ± 669 mL/day. The MIS score (4 ± 3.3) revealed a low-to-moderate malnutrition burden, showing significant negative correlations with serum albumin (r = -0.549; p < 0.001), total iron-binding capacity (r = -0.497; p = 0.006), and BIA derived dry weight (r = -0.385; p = 0.025). Greater residual renal function was positively associated with improved iron-binding capacity (r = 0.491; p = 0.005). Notably, MIS showed no association with acute hydration status or free water (r = -0.116; p = 0.515).

Conclusion

The MIS scale is a reliable tool reflecting protein-visceral wasting and the objective loss of muscle and fat mass detected by BIA. Its performance is independent of fluctuations in extracellular volume status (free water), supporting its utility for preventive nutritional monitoring in this population. The trend toward lower dry weight with increasing age (p = 0.081) highlights the risk of sarcopenia in older adults undergoing PD.