Is hypertension a mortality risk factor in dialysis?

Area of Science:

• Nephrology
• Cardiovascular Medicine
• Clinical Epidemiology

Background:

• Hypertension is a common comorbidity in patients with chronic kidney disease.
• The impact of hypertension on mortality in patients undergoing dialysis requires further clarification.

Purpose of the Study:

• To investigate the association between hypertension and mortality in a cohort of chronic uremic patients receiving dialysis.
• To identify other prognostic factors influencing survival in this patient population.

Main Methods:

• Retrospective study of 370 chronic uremic patients (234 males, 136 females; mean age 53 ± 15 years).
• Hypertension defined as blood pressure > 150/90 mmHg.
• Analysis included patient age, dialysis duration, renal diagnosis, and dialysis modality (hemodialysis vs. peritoneal dialysis).
• Statistical methods included Cox proportional hazard analysis and chi-squared test.

Main Results:

• No significant difference in survival was observed between normotensive and hypertensive patients.
• Patients with diabetic nephropathy exhibited significantly poorer survival compared to other nephropathies, independent of blood pressure.
• Aging and peritoneal dialysis were associated with an increased risk of death.
• Hypertension was identified as a mortality risk factor only in patients younger than 50 years (P < 0.05).

Conclusions:

• Hypertension does not appear to be the primary risk factor for overall mortality in patients undergoing dialysis.
• Diabetic nephropathy and older age are significant predictors of poorer survival in this population.
• The role of hypertension in mortality risk is age-dependent.