Seasonal Variations in Mortality and Clinical Indicators in International Hemodialysis Populations from the MONDO Registry

Overview

Journal BMC Nephrol

Publisher Biomed Central

Specialty Nephrology

Date 2015 Aug 15

PMID 26272070

Citations 18

Authors

Adrian M Guinsburg

Len A Usvyat

Michael Etter

Xiaoqi Xu

Stephan Thijssen

Daniele Marcelli

Bernard Canaud

Cristina Marelli

Claudia Barth

Yuedong Wang

Paola Carioni

Frank M van der Sande

Peter Kotanko

Jeroen P Kooman

Affiliations

Soon will be listed here.

Abstract

Background: Seasonal mortality differences have been reported in US hemodialysis (HD) patients. Here we examine the effect of seasons on mortality, clinical and laboratory parameters on a global scale.

Methods: Databases from the international Monitoring Dialysis Outcomes (MONDO) consortium were queried to identify patients who received in-center HD for at least 1 year. Clinics were stratified by hemisphere and climate zone (tropical or temperate). We recorded mortality and computed averages of pre-dialysis systolic blood pressure (pre-SBP), interdialytic weight gain (IDWG), serum albumin, and log C-reactive protein (CRP). We explored seasonal effects using cosinor analysis and adjusted linear mixed models globally, and after stratification.

Results: Data from 87,399 patients were included (northern temperate: 63,671; northern tropical: 7,159; southern temperate: 13,917; southern tropical: 2,652 patients). Globally, mortality was highest in winter. Following stratification, mortality was significantly lower in spring and summer compared to winter in temperate, but not in tropical zones. Globally, pre-SBP and IDWG were lower in summer and spring as compared to winter, although less pronounced in tropical zones. Except for southern temperate zone, serum albumin levels were higher in winter. CRP levels were highest in winter.

Conclusion: Significant global seasonal variations in mortality, pre-SBP, IDWG, albumin and CRP were observed. Seasonal variations in mortality were most pronounced in temperate climate zones.

Citing Articles

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