The following are the risk factors for POP in geriatric patients with hip fractures: advanced age, male sex, ASA classification ≥3, dependent functional status, history of smoking, COPD, DM, CHD, arrhythmia, CVA, dementia, CRF, hip arthroplasty, delayed surgery, increased preoperative Cr, and decreased preoperative Alb. Here, ALB is linked to Arrhythmia.