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Seasonal changes in blood pressure in chronic kidney disease patients

S-H Bi1, L-T Cheng, D-X Zheng

  • 1Division of Nephrology, Peking University Third Hospital, Beijing, China.

Clinical Nephrology
|February 25, 2010
PubMed

Insights

Blood pressure in chronic kidney disease (CKD) patients fluctuates seasonally, increasing in winter and decreasing in warmer months. This variation is linked to outdoor temperature, not CKD stage or body weight changes.

Area of Science:

  • Nephrology
  • Cardiovascular Medicine
  • Environmental Health

Background:

  • Seasonal variations in blood pressure (BP) are documented across populations.
  • Chronic kidney disease (CKD) affects a growing global population, yet seasonal BP changes in CKD patients remain understudied.
  • The influence of volume status on seasonal BP fluctuations is debated.

Purpose of the Study:

  • To investigate seasonal blood pressure variations in patients with chronic kidney disease.
  • To explore potential correlations between seasonal BP changes and CKD stage, body weight, and outdoor temperatures.

Main Methods:

  • A cohort of 109 CKD patients was monitored over one year (2007).
  • Systolic and diastolic blood pressure, serum creatinine, and body weight were recorded.
  • Climatology data from the Beijing Weather Bureau were analyzed alongside patient measurements.

Main Results:

  • Blood pressure exhibited a distinct annual cyclic pattern, peaking in autumn/winter and declining in spring/summer.
  • CKD patient BP showed a significant inverse correlation with outdoor temperatures (SBP: r = -0.882, p < 0.001; DBP: r = -0.860, p < 0.001).
  • No significant correlation was found between seasonal BP variations and CKD stage or body weight fluctuations.

Conclusions:

  • Blood pressure in CKD patients demonstrates significant seasonal variation.
  • Seasonal BP changes in CKD patients are inversely associated with outdoor temperature.
  • Volume status and body weight changes do not appear to be primary drivers of seasonal BP variation in this CKD cohort.
Abstract

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