title: [Factors related to interdialytic weight gain in hemodialysis patients].
abstract: BACKGROUND
  Studies have shown that interdialytic weight gain (IDWG) of hemodialysis (HD) patients is influenced by many factors, a high IDWG negatively affecting the blood pressure (BP) of this population.
  
  
  OBJECTIVE
  To evaluate the relation of clinical, demographic and nutritional factors and the IDWG of HD patients.
  
  
  METHODS
  Cross-sectional study of 278 HD (54% males; age=54.4 ± 14.4 years) from 6 dialysis centers in the State of Santa Catarina, Brazil. The means of percentage interdialytic weight gain (%IDWG) and BP during a four-week period were calculated. Body mass index (BMI) and the 7-point subjective global assessment (SGA) scale were used to assess nutritional status.
  
  
  RESULTS
  The means were: %IDWG 4.06 ± 1.55%, pre-HD BP 140 ± 50 / 99 ± 25 mmHg, and post-HD BP 110 ± 27 / 78 ± 10 mmHg. %IDWG inversely correlated with age and BMI and directly correlated with pre-HD systolic BP and time on HD. Women and patients without diabetes mellitus had higher %IDWG. Only the younger subgroup of patients with SGA-defined malnutrition had higher %IDWG than well-nourished ones. When malnutrition was BMI-defined, higher %IDWG was found in the whole study population and in the female and younger age subgroups. 24% of the patients had increased %IDWG (> 5%) and, when compared with those with adequate %IDWG, had inadequate and higher levels of systolic BP (144 ± 21 versus 138 ± 20 mmHg, p < 0.05), were younger and had lower BMI.
  
  
  CONCLUSIONS
  These results showed that %IDWG of HD patients was influenced by gender, time on dialysis, age and nutritional status, and that high %IDWG adversely affected the BP of this population.
authors: Fundação Pró-Rim-Joinville-SC, Brasil. fabiana@prorim.com.br
authors: Fabiana Baggio
authors: FB
authors: Nerbass
authors: Jyana Gomes
authors: JG
authors: Morais
authors: Rafaela Gonzaga dos
authors: RG
authors: Santos
authors: Tatiana Stela
authors: TS
authors: Krüger
authors: Telma Tatiana
authors: TT
authors: Koene
authors: Hercilio Alexandre da Luz
authors: HA
authors: Filho
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D006435:Renal Dialysis; D015430:Weight Gain; D055815:Young Adult