#2075 Impact of chronic obstructive pulmonary disease on the outcomes of hemodialysis patients

Abstract Background and Aims Chronic obstructive pulmonary disease, COPD, is a common cause of morbidity and mortality. Comorbidities are frequent among COPD patients, some of which are explained by shared risk factors of smoking and increased age. Chronic kidney disease, leading to end-stage renal disease requiring hemodialysis (HD) is not uncommon in patients with COPD, and vice-versa. The prevalence and the impact of coexistence of COPD among HD patients was not extensively described. We aimed to measure the prevalence of COPD among a cohort of HD patients, and study how it relates to significant outcomes of mortality, morbidity, including unplanned hospital admissions, and kidney transplantation (KT). Method A retrospective study of subjects who initiated HD during 2015-2018. Participants were categorized into one of two groups, with or without COPD. Clinical, laboratory and pulmonary function tests data were extracted from medical records, as were outcomes of mortality, morbidity, and KT (until December 31st, 2021, or until death). Results Forty-three of 234 were diagnosed with COPD (18.4%). Their average FEV1%pred was 60%. Thirty-eight subjects in the COPD group (88.4%) were hospitalized for severe COPD exacerbations during a mean follow-up of 36.1 months, averaging 3.6 severe exacerbations per patient. Despite this, maintenance inhaler therapy was underutilized. All-cause mortality rates were higher for HD patients with COPD (72.1% vs. 47.1%, p=0.003), as were rates of acute coronary syndrome (39.5% vs. 23.6%, p=0.026). Conclusion COPD is common among HD patients and is associated with significant morbidity and increased mortality.