In end-stage renal disease, each 1% increase in systolic blood pressure coefficient of variation was associated with higher all-cause mortality (HR 1.63; 95% CI 1.05-2.53).
Cohort (n=144)
No
Does increased systolic blood pressure variability predict cardiovascular and all-cause mortality in end-stage renal disease patients on dialysis?
Increased systolic blood pressure variability is a significant independent predictor of all-cause mortality in patients with end-stage renal disease on dialysis.
Effect estimate: HR 1.63 (95% CI 1.05-2.53)
BACKGROUND: Prospective and case-control studies show that blood-pressure variability is an independent risk factor for severe organ damage and cardiovascular events in hypertensives. We prospectively studied the association between systolic blood pressure variability and cardiovascular mortality and mortality from all causes in end-stage renal disease patients. METHODS AND RESULTS: The subjects were 144 patients (86 men, 58 women; mean age+/-SD, 52+/-13 years) who underwent dialysis in the same dialysis centre and were examined for blood-pressure variability. The study period was 38 months beginning in January 1995, during which six cardiovascular and seven noncardiovascular fatalities occurred. Coefficient of variation in systolic blood pressure in 1994, as an indicator of systolic blood pressure variability, ranged from 7.8 to 14.6%. Cumulative incidence of death from all causes was related to coefficient of variation in systolic blood pressure. The difference between the maximum and minimum systolic blood pressure (deltaSBP) in 1994 ranged from 44 to 146 mmHg (mean+/-SD, 78+/-13 mmHg) and correlated significantly with coefficient of variation in systolic blood pressure (r = 0.65, P<0.0001). Cox regression analysis was used to identify the independent predictors for mortality. The hazard ratio for death from all causes increased 1.63 times per 1% increase in coefficient of variation in systolic blood pressure (hazard ratio; 95% confidence interval: 1.63; 1.05-2.53) and 1.03 times per 1 mmHg increase in deltaSBP (1.08; 1.03-1.14). CONCLUSION: These results suggest that systolic blood pressure variability may be a significant prognostic factor in end-stage renal disease.
Tozawa et al. (1999) conducted a cohort in End-stage renal disease (n=144). Systolic blood pressure variability was evaluated on Death from all causes (HR 1.63, 95% CI 1.05-2.53). In end-stage renal disease, each 1% increase in systolic blood pressure coefficient of variation was associated with higher all-cause mortality (HR 1.63; 95% CI 1.05-2.53).