The protective factors of Refeeding syndrome were identified enteral nutrition (OR: 0.46, 95% CI: 0.24 - 0.88), energy supply ≥ 50% BEE (OR: 0.26, 95% CI: 0.11 - 0.58), protein supply ≥ 50% basal expenditure (OR: 0.23, 95% CI: 0.09 - 0.42), intravenous infusion of potassium (OR: 0.23, 95% CI: 0.1 - 0.51).