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Blood Pressure Seasonality in Hemodialysis Patients from Five European Cities of Different Latitudes
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Medicine.
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2018 (English)In: Kidney and Blood Pressure Research, ISSN 1420-4096, E-ISSN 1423-0143, Vol. 43, no 5, p. 1529-1538Article in journal (Refereed) Published
Abstract [en]

Background/Aims: Climate influences the regulation of blood pressure (BP). Our objective was to precisely estimate BP seasonality in hemodialysis (HD) patients from five European cities with marked climate differences. Methods: Stable prevalent HD patients from 5 European facilities (Santa Cruz de Tenerife (Spain), Seville (Spain), Montpellier (France), Ottignies (Belgium), Umea (Sweden)) present over the years 1995-1999 were included in this historical longitudinal observational study. Individual monthly averages of pre-dialysis BP level were computed from all facility BP measurements (>90 000 observations). The association between BP level and location, seasons and meteorological measurements was analyzed by mixed models. Results: 261 patients were included and followed-up for a median duration of 2 years (6903 monthly observations). Pre-dialysis SBP and DBP were minimal in summer (July) and maximal in winter (November and December), and mean changes were respectively 4.2 [3.0;5.4] and 2.0 [1.3;2.7] mmHg. Seasonality was confirmed in 4 locations (P-season <= 0.0010.001 for SBP and DBP), but not in Umea (both P-season >0.05). Seasonal changes in DBP were larger in southern locations (P-interaction =0.02). BP level was associated with climate parameters: in a positive manner with humidity or rainfall, and inversely with sunshine duration or temperature. The effects of temperature and rainfall on DBP varied with latitude (P-interaction <0.02) and were greater in southern locations. Conclusion: BP varies with seasons and climate in different European areas and seasonality can be more important in southern locations. These changes in BP deserve attention as they may be responsible for a significant increase in cardiovascular risk which may be preventable.

Place, publisher, year, edition, pages
S. Karger, 2018. Vol. 43, no 5, p. 1529-1538
Keywords [en]
Chronic renal failure, Blood pressure, Weather, Geography, Chronic hemodialysis
National Category
Urology and Nephrology Physiology Cardiac and Cardiovascular Systems
Identifiers
URN: urn:nbn:se:umu:diva-156349DOI: 10.1159/000494019ISI: 000456656400011PubMedID: 30286451OAI: oai:DiVA.org:umu-156349DiVA, id: diva2:1287875
Available from: 2019-02-12 Created: 2019-02-12 Last updated: 2019-02-12Bibliographically approved

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Stegmayr, Bernd

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