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Published on: October 2, 2020
Predictors of Survival and Clinical Outcomes in Hemodialysis Patients: A 9-Year Multicenter Cohort Study
Tayebeh Soleymanian1, Atefeh Yousefi2, Farnaz Tavakoli3
11Professor of Nephrology, Nephrology and Kidney Transplantation Ward, Department of Internal Medicine, Shariati Hospital, School of Medicine, Tehran University of Medical sciences, Tehran, Iran.
Insights
High mortality persists in hemodialysis patients. Older age, diabetes, and poor nutrition significantly increase mortality risk, highlighting the need for targeted interventions in end-stage kidney disease management.
Area of Science:
- Nephrology
- Internal Medicine
- Public Health
Background:
- Hemodialysis patients face high cardiovascular and non-cardiovascular mortality rates.
- Despite advancements in dialysis, prognosis remains poor for many with end-stage kidney disease (ESKD).
Purpose of the Study:
- To identify key factors associated with long-term mortality in adult hemodialysis patients.
- To analyze causes of death and predict mortality risk in this vulnerable population.
Main Methods:
- Prospective cohort study of 185 adult ESKD patients on maintenance hemodialysis.
- Follow-up for 103 months (8.5 years) to track mortality and dialysis exit.
- Cox proportional hazards model used for mortality prediction, adjusting for clinical and laboratory variables.
Main Results:
- The cohort had a mean age of 57 years; 52.5% were male, and 48% had diabetes.
- Mortality rate was 19 per 100 patient-years, with 71% of patients dying during the study.
- Leading causes of death were cardiovascular diseases (47%) and infections (32.5%).
Conclusions:
- Older age, diabetes mellitus, and poor nutritional biomarkers are significant predictors of mortality.
- Catheter vascular access is also identified as a factor contributing to poor long-term prognosis.
- These findings underscore the need for improved management strategies for hemodialysis patients.
Introduction:
Cardiovascular and non-cardiovascular mortality rates among hemodialysis patients continue to be high despite advances in dialysis therapy.
Materials And Methods:
This prospective cohort study enrolled 185 adult patients with end-stage kidney disease (ESKD) on maintenance hemodialysis (HD) from three hemodialysis facilities (Shariati hospital, Shohadaye Hafte-Tir hospital and Sevome-Sha'ban hospital ) in September 2012. Causes of death and HD exit were tracked over a follow-up period of 103 months (8.5 years). The Cox proportional hazards model was employed to predict mortality after adjusting for case-mix and laboratory data variables.
Results:
The mean age of the patients was 57 ± 15.2 years, with a mean dialysis vintage of 39 ± 45 months. The cohort comprised 52.5% males and 48% diabetic patients. In the univariate analysis, mortality rate was higher among women (81% vs. 63%), diabetics (89% vs. 55%), and those with higher body mass index, older age, and lower serum creatinine, albumin, and intact PTH levels. A total of 132 patients (71%) died, with a mortality rate of 19 per 100 patient-years. The leading causes of death were cardiovascular diseases (47%) and infections (32.5%). Kidney transplantation was performed in 25 patients (14%), including 7 women and 18 men. The median survival was 4.1 years (95% CI: 3.3-5.0). The survival rates at one, two, three, five, and nine years were 83%, 64%, 56%, 39%, and 19%, respectively.
Conclusion:
Older age, poor nutritional biomarkers, diabetes mellitus, and catheter vascular access are the primary factors contributing to poor long-term prognosis in hemodialysis patients.
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