NPPB and nutritional deficiency disease: Conversely, it exhibited significant negative correlations with age (−0.585, p < 0.001), polypharmacy (−0.333, p < 0.001), malnutrition (−0.361, p < 0.001), functional trajectory (−0.241, p < 0.001), disability (−0.449, p < 0.001) and NT-proBNP (−0.595, p < 0.001).