Factors Associated with Functional Performance among Patients on Hemodialysis in Taiwan

Abstract

Background/Aims: We investigated factors associated with functional performance in hemodialysis (HD) patients as well as their relationships with mortality. Methods: We enrolled 790 HD patients who were followed up from 2009 to 2013. Functional performance was evaluated by Karnofsky Performance Status Scale (KPSS) scores. We examined the associations of clinical variables and all-cause mortality with KPSS scores. Results: Of the participants, 460 had high KPSS scores (range 90–100) and 330 had low KPSS scores (below 80). On multivariate analysis, age and weekly HD sessions were associated with significantly increased odds of a lower KPSS score (age: OR 1.05, 95% CI 1.04–1.07, p < 0.001; weekly HD: OR 2.10, 95% CI 1.37–3.21, p = 0.001). A low KPSS score was a significant predictor of increased all-cause mortality (hazard ratio 1.49; 95% CI 1.02–2.16, p = 0.037), as determined using Cox regression analysis. Conclusion: Functional performance was associated with clinical variables and all-cause mortality in HD patients.