Sarcopenia is a risk factor for postoperative delirium in geriatric hip fracture patients: a retrospective study - Qi, Yi-Ming; Li, Hao-Tao; Chang, Shi-Min; Hu, Sun-Jun; Du, Shou-Chao; Liu, Chen-Dong; Chu, Yong-Qian; Rui, Yun-Feng (Frontiers in Medicine, 2025)