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[Renal disease severity index, clinical indicators and mortality of patients in hemodialysis]
Cássia Morsch1, Luiz Felipe Gonçalves, Elvino Barros
1Serviço de Nefrologia, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Faculdade de Medicina, RS.
Objective:
Comorbidity is a major factor influencing mortality in hemodialysis patients. Kt/V, hematocrit and albumin levels have also been associated with mortality in these patients. The purpose of this study was to evaluate the severity of comorbidity, Kt/V, hematocrit and albumin levels as predictors of mortality in patients on hemodialysis therapy.
Methods:
Forty patients were followed up during 12 months and assessed in relation to social demographic characteristics, time on dialysis therapy, presence of diabetes, Kt/V, hematocrit and albumin levels, also comorbidities. The impact of comorbidity on mortality was assessed by the end-stage renal disease severity index (ESRD-SI).
Results:
Mean ESRD-SI scores for survivals (85%) and deaths (15%) were 22 +/- 14.8 vs. 44 +/- 12.4 (p < 0.001), and for diabetic (29%) and non-diabetic patients (71%), 40 +/- 15.1 vs. 19 +/- 12.5 (p < 0.001). An inverse correlation was observed between ESRD-SI scores and albumin (r = -0.475; p < 0.005). Albumin levels = 3.6 g/dL were mostly observed (82%) in patients without diabetes (p = 0.021). A correlation was observed between hematocrit and albumin levels (r = 0.544; p < 0.001). For each 1-point increase in the ESRD-SI scores, there was a 10% increase in the risk of death (p = 0.0093).
Conclusion:
The ESRD-SI is useful to assess the severity of comorbidities and to predict mortality in hemodialysis patients.
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