COVID-19 impact on elderly hemodialysis population: Results from the Spanish COVID-19 CKD working group registry

ABSTRACT

BACKGROUND AND AIMS: Age and chronic kidney disease have been described as mortality risk factors for coronavirus disease 2019 (COVID-19). Currently, an important percentage of patients in hemodialysis are elderly. This study aimed to investigate the impact of COVID-19 in this population and to determine risk factors associated with mortality. METHOD: Data was obtained from the Spanish COVID-19 CKD Working Group Registry, that included patients in renal replacement therapy (dialysis and kidney transplantation) infected by COVID-19. From March 18, 2020, to August 27, 2020, 1165 patients on hemodialysis affected by COVID-19 were included in the Registry. A total of 328 patients were under 65 years-old and 837 were 65 years old or older (elderly group). RESULTS: Mortality was 18.6% higher (95% confidence interval (CI) 13.8%-23.4%) in the elderly hemodialysis patients compared to the non-elderly group (see figure). Death from COVID-19 infection was increased 5.5-fold in hemodialysis patients compared to mortality in the general population for a similar period, and there was an age-associated mortality increase in both populations (see figure 1). In multivariate Cox regression analysis, age (hazard ratio (HR) 1.58, 95% CI 1.31-1.92), dyspnea at presentation (HR 1.61, 95% CI 1.20-2.16), pneumonia (HR 1.76, 95% CI 1.12-2.75) and admission to hospital (HR 4.13, 95% CI 1.92-8.88) were identified as independent mortality risk factors in the elderly hemodialysis population. Treatment with glucocorticoids reduced the risk of death (HR 0.71, 95% CI 0.51-0.98) in aged patients on hemodialysis. CONCLUSION: Mortality is dramatically increased in elderly hemodialysis patients affected by COVID-19. Age, dyspnea at presentation, pneumonia or hospitalization are factors associated with a worse prognosis, after adjusting dialysis population to other confounding factors. Treatment with glucocorticoids could be a therapeutic option for this specific population. (Table Presented).