Prognostic impact of nutritional status and physical capacity in elderly patients with acute decompensated heart failure

Abstract

Abstract Aims Nutritional status as well as physical capacity is related to prognosis in patients with heart failure. The purpose of this study was to explore a simple prognostic indicator in patients with acute decompensated heart failure (ADHF) by including both nutritional status and physical capacity. Methods and results Patients hospitalized with ADHF (N = 203; mean age, 81 years) were enrolled. We evaluated the geriatric nutritional risk index (GNRI) on hospital admission and at discharge. A GNRI score < 92 was defined as malnutrition. Physical capacity was evaluated by simple walking test to determine if patients could walk 200 m, with a Borg scale score ≤ 13, without critical changes in vital signs. Primary endpoints were mortality and heart failure rehospitalization within 2 years. A total of 49% and 48% of patients showed malnutrition on admission and at discharge, respectively. Malnutrition at discharge was more strongly related to mortality [hazard ratio (HR) 3.382, 95% confidence interval (CI) 1.900–6.020, P < 0.0001)] than that on admission (HR 2.448, 95% CI 1.442–4.157, P = 0.001) by univariable analysis. Malnutrition at discharge was related to mortality (HR 2.370, 95% CI 1.166–4.814, P = 0.02), but malnutrition on admission was not related (HR 1.538, 95% CI 0.823–2.875, P = 0.18) by multivariable analysis. Almost half of patients (45%) could not walk 200 m, which was significantly related to mortality by univariable analysis (HR 3.303, 95% CI 1.905–5.727, P < 0.0001), but was not by multivariable analysis (HR 1.990, 95% CI 0.999–3.962, P = 0.05). The combined index including both GNRI and simple walking test was an independent and stronger predictor of mortality than either index alone by multivariable analysis (HR 2.249, 95% CI 1.362–3.716, P < 0.01). Neither malnutrition nor low physical capacity was related to heart failure rehospitalization by univariable analysis (HR 0.702, 95% CI 0.483–1.020, P = 0.06; HR 1.047, 95% CI 0.724–1.515, P = 0.81, respectively). Malnutrition at discharge significantly reduced heart failure rehospitalization by multivariable analysis (HR 0.431, 95% CI 0.266–0.698, P < 0.01). When patients were classified into Group G (both nutritional status and physical capacity at discharge were good), Group E (either was good), and Group B (both were bad), mortality rates were significantly different among the groups (log rank P < 0.0001). Conclusion A simple indicator including both nutritional status and physical capacity may predict 2 year mortality in elderly patients with ADHF.

Keywords

• Geriatric nutritional risk index
• Simple walking test
• Acute decompensated heart failure
• Elderly patients