A Retrospective Analysis of Risk Factors for Mortality during Hemodialysis at a General Hospital That Treats Comprehensive Diseases

OBJECTIVE: We analyzed adverse events retrospectively during a three-year follow-up of patients undergoing hemodialysis at the dialysis center of our general hospital that can treat comprehensive diseases and conducted an exploratory study focusing on the risk factors that determine the prognosis of hemodialysis patients. METHODS: A total of 132 hemodialysis patients at our dialysis center as of June 2017 were included in the study. Data on event incidence, including death and various clinical indicators, were collected in the electronic medical record for three years until June 2020. RESULTS: Between June 2017 and June 2020, 33 of the 132 patients died. The mortality group had a lower body mass index (BMI) and a longer duration of hemodialysis already carried out with more preexisting upper gastrointestinal (GI) bleeding, infections, ischemic heart disease (IHD), and malignancy than the survival group. Furthermore, the mortality group took more warfarin, aspirin, proton pump inhibitors and less H(2) blockers than the survival group. Occurrence of upper or lower GI bleeding was similar between the mortality and survival groups. In a univariate analysis for mortality, the odds ratio was significantly higher for a low BMI (＜18), long duration of hemodialysis, history of upper GI bleeding, and presence of IHD. Multivariable-adjusted odds ratios for mortality were significantly higher for cases with a history of upper GI bleeding and BMI ＜18. CONCLUSION: A history of upper GI bleeding and low BMI may be poor prognostic factors of hemodialysis patients. Careful management of upper GI bleeding and a low BMI are required during the initiation of hemodialysis.