Predialysis systolic BP variability and outcomes in hemodialysis patients.

Published

Journal Article

BP variability (BPV) is an important predictor of outcomes in the general population, but its association with clinical outcomes in hemodialysis patients is not clear. We identified 11,291 patients starting dialysis in 2003-2008 and followed them through December 31, 2008 (median=22 months). Predialysis systolic BPV was assessed over monthly intervals. Outcomes included factors associated with BPV, mortality (all-cause and cardiovascular), and first cardiovascular event (cardiovascular death or hospitalization). Patients' mean age was 62 years, 55% of patients were men, and 58% of patients were white. Modifiable factors associated with higher BPV included obesity, higher calcium-phosphate product levels, and lower hemoglobin concentration; factors associated with lower BPV included greater fluid removal, achievement of prescribed dry weight during dialysis, higher hemoglobin concentration, and antihypertensive regimens without β-blockers or renin-angiotensin system blocking agents. In total, 3200 deaths occurred, including 1592 cardiovascular deaths. After adjustment for demographics, comorbidities, and clinical factors, higher predialysis BPV was associated with increased risk of all-cause mortality (hazard ratio [HR], 1.18; 95% confidence interval [95% CI] per 1 SD increase in BPV, 1.13 to 1.22), cardiovascular mortality (HR, 1.18; 95% CI, 1.12 to 1.24), and first cardiovascular event (HR, 1.11; 95% CI, 1.07 to 1.15). Results were similar when BPV was categorized in tertiles and patients were stratified by baseline systolic BP. In summary, predialysis systolic BPV is an important, potentially modifiable risk factor for death and cardiovascular outcomes in incident hemodialysis patients. Studies of BP management in dialysis patients should focus on both absolute BP and BPV.

Full Text

Duke Authors

Cited Authors

  • Shafi, T; Sozio, SM; Bandeen-Roche, KJ; Ephraim, PL; Luly, JR; St Peter, WL; McDermott, A; Scialla, JJ; Crews, DC; Tangri, N; Miskulin, DC; Michels, WM; Jaar, BG; Herzog, CA; Zager, PG; Meyer, KB; Wu, AW; Boulware, LE; DEcIDE Network Patient Outcomes in End Stage Renal Disease Study Investigators,

Published Date

  • April 2014

Published In

Volume / Issue

  • 25 / 4

Start / End Page

  • 799 - 809

PubMed ID

  • 24385593

Pubmed Central ID

  • 24385593

Electronic International Standard Serial Number (EISSN)

  • 1533-3450

Digital Object Identifier (DOI)

  • 10.1681/ASN.2013060667

Language

  • eng

Conference Location

  • United States