Association between quality of life and various aspects of intradialytic hypotension including patient-reported intradialytic symptom score

BackgroundThere is increasing awareness that, besides patient survival, Quality of Life (QOL) is a relevant outcome factor for patients who have a chronic disease. In haemodialysis (HD) patients, intradialytic hypotension (IDH) is considered one of the most frequent complications, and this is often accompanied by symptoms. Several studies have investigated QOL in dialysis patients, however, research on the association between intradialytic symptoms and QOL is minimal. The goal of this study was to determine whether the occurrence of IDH has an influence on the perception of QOL.MethodsDuring 3 months, haemodynamic data, clinical events, and interventions of 2623 HD-sessions from 82 patients were prospectively collected. The patients filled out a patient-reported intradialytic symptom score (PRISS) after each HD session. IDH was defined according to the EBPG as a decrease in SBP 20mmHg or in MAP 10mmHg associated with a clinical event and need for nursing interventions. Patient's self-assessment of QOL was evaluated by the 36-Item Short-Form Health Survey.ResultsThere were no significant associations between the mental summary score or the physical summary score and the proportion of dialysis sessions that fulfilled the full EBPG definition. A lower PRISS was significantly associated with the proportion of dialysis sessions that fulfilled the full EBPG definition (R=-0.35, P=0.0011), the proportion of dialysis sessions with a clinical event (R=-0.64, P=0.001), and the proportion of dialysis sessions with nursing interventions (R=-0.41, P=0.0001). The physical component summary and mental component summary were significantly negatively associated with the variable diabetes and positively with PRISS (P=0.003 and P=0.005, respectively). UF volume was significantly negatively associated with mental health (P=0.02) and general health (P=0.01).ConclusionsOur findings suggest that the EBPG definition of IDH does not capture aspects of intradialytic symptomatology that are relevant for the patient's QOL. In contrast, we found a significant association between QOL and a simple patient-reported intra-dialytic symptom score, implying that how patients experience HD treatment influences their QOL.