Blood pressure and mortality in U.S. veterans with chronic kidney disease: a cohort study

Annals of Internal Medicine
|September 13, 2013
PubMed

Insights

The ideal blood pressure (BP) for patients with chronic kidney disease (CKD) appears to be 130-159/70-89 mm Hg. Achieving lower diastolic BP may increase mortality risk in CKD patients.

Area of Science:

  • Nephrology
  • Cardiovascular Medicine
  • Epidemiology

Background:

  • The optimal blood pressure (BP) target for reducing mortality in non-dialysis-dependent chronic kidney disease (CKD) patients remains uncertain.
  • Understanding BP associations with mortality is crucial for managing CKD patients.

Purpose of the Study:

  • To investigate the relationship between combined systolic BP (SBP) and diastolic BP (DBP) levels and all-cause mortality in a large cohort of US veterans with CKD.

Main Methods:

  • A historical cohort study was conducted from 2005-2012, including 651,749 US veterans with CKD.
  • BP was categorized into 96 combinations of SBP and DBP.
  • Time-dependent Cox models were used to analyze associations with all-cause mortality, adjusting for confounders.

Main Results:

  • The lowest adjusted mortality rates were observed in patients with SBP of 130-159 mm Hg and DBP of 70-89 mm Hg.
  • Conversely, very high or very low SBP and DBP were associated with the highest mortality rates.
  • Moderately elevated SBP with DBP ≥70 mm Hg showed lower mortality than ideal SBP with DBP <70 mm Hg.

Conclusions:

  • The optimal BP range for CKD patients is suggested to be 130-159/70-89 mm Hg.
  • Prioritizing ideal SBP at the cost of suboptimal DBP may not be beneficial for mortality outcomes in CKD.
  • Study limitations include a predominantly male cohort, missing proteinuria data, and inability to establish causality.
Abstract

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