The effect of ambient temperature and humidity on interdialytic weight gains in end-stage renal disease patients on maintenance hemodialysis

Mihály B. Tapolyai, Mária Faludi, Klára Berta, Tibor Szarvas, Zsolt Lengvárszky, M. Molnár, Neville R. Dossabhoy, Tibor Fülöp

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Purpose: Interdialytic weight gain (IDWG) is both a measure of dietary compliance and a well-established predictor of future adverse outcomes in dialysis patients. The impact of environmental conditions on IDWG in end-stage renal disease is little studied to date. Methods: We retrospectively reviewed IDWG for 100 consenting chronic end-stage renal disease patients undergoing thrice weekly in-center hemodiafiltration under three different climatic conditions in a Central European city: Weekend_1 was humid (93 %) and warm (24 °C); Weekend_2 was dry (38 %) and hot (33 °C); and Weekend_3 was dry (30 %) and warm (24 °C). Results: The cohort’s mean age was 60.9 ± 14.7 years, all were Eastern European, and 56 % were men. Residual urine output measured 100 [25–75 % quartiles: 0, 612] mL/day, single-pool Kt/V 1.4 ± 0.25, and albumin 40.1 ± 3.9 g/L. Mean IDWGs measured as follows: Weekend_1 (“humid-warm”): 2973 ± 1386 mL; Weekend_2 (“dry-hot”): 2685 ± 1368 mL and Weekend_3 (“dry-warm”): 2926 ± 1311 mL. Paired-samples testing for difference showed higher fluid gains on the humid-warm (239 mL; 95 % CI 21–458 mL; p = 0.032) and on the dry-warm weekends (222 mL; 95 % CI −8 to 453 mL, p = 0.059), when compared to the dry-hot weekend. Under the latter, dry-hot climatic condition, residual urine output lost its significance to impact IDWG during multiple regression analysis. Conclusion: While excess temperature may impact IDWG to a small degree, air humidity does not; the least weight gains occurred on the dry-hot weekend. However, the effects of both were minimal under continental summer conditions and are unlikely to explain large excesses of individual session-to-session variations.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalInternational Urology and Nephrology
DOIs
Publication statusAccepted/In press - Apr 28 2016

Keywords

  • Compliance
  • Fluid overload
  • Humidity
  • Residual urine output
  • Sweating
  • Temperature

ASJC Scopus subject areas

  • Nephrology
  • Urology

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