ALB and hip fracture: Elderly patients with hip fracture who are over 75 years old (HR 2.691, 95% CI 1.764–4.104), have combined coronary heart disease (HR 1.837, 95% CI 1.203–2.806), hemoglobin levels below 100 g/L at admission (HR 2.060, 95% CI 1.190–3.566), and albumin levels below 40 g/L at admission (HR 1.625, 95% CI 1.022–2.584) are at an increased risk for perioperative AHF.