Abstract: Objective To evaluate the epidemiology and the influencing factors of renal anemia in the elderly patients undergoing maintenance hemodialysis (MHD). Methods Cross-sectional study was carried out among the patients undergoing MHD treatment in the hemodialysis center of Taizhou People's Hospital in January 2022. According to inclusion and exclusion criteria, the general information and laboratory examination information of the patients were included. All the patients were divided into aged group (n=124) and young and middle-aged group (n=236). The patients in the aged group were divided into anemic subgroup and non-anemic subgroup. Logistic regression was performed to analyze the risk factors of renal anemia. Results The standardization rate of renal anemia control in our hemodialysis center was 53.1%. The standardization rate in aged group was 44.4%, which was significantly lower than that of young and middle-aged group (57.6%) (P=0.02). The levels of hemoglobin (Hb) was positively correlated with hematocrit (HCT), serum albumin (ALB), total cholesterol (TC), triglyceride (TG), magnesium, calcium, transferrin saturation, serum iron, and was negatively correlated with red cell distribution width (RDW-CV) and C-reactive protein (CRP) in the elderly MHD patients. Logistic regression analysis revealed that low level of TG and serum iron were independent risk factors of renal anemia. Conclusions The incidence rate of renal anemia in the elderly MHD patients is much higher than that in the young and middle-aged group. The low level of TG and serum iron is associated with the incidence of renal anemia in the elderly MHD patients.

Key words: maintenance hemodialysis, renal anemia, influencing factor