Summary. The aim of the present research was to identify predictors of hospitalization hemodialysis (HD) patients. Materials and methods. The study involved 186 HD patients (49,38±0,94 у.) between Jan 2013 and Jan 2014. We studied the evolution of laboratory and treatment parameters, including dry body-weight, ultrafiltration, mean blood pressure, plasma albumin, Hb, absolute lymphocyte count, absolute neutrophil count, neutrophil-to-lymphocyte ratio, “hemoglobin variability ” all patients. The HD patients were divided for 2 groups: I group of outpatients (n=103), II group of hospitalized patients (n=83). Data from 83 hospitalized patients were compared with non-hospitalized patients. Laboratory and treatment parameters were assessed at least 3 months prior to admission. Results. We found that hospitalization was 45,29±4,20 days, frequency of hospitalization 1,46±0,07. The likelihood of frequency and duration a hospitalization increased with patient age (p