Fig. 1From: Preoperative prognostic nutritional index value as a predictive factor for postoperative delirium in older adult patients with hip fractures: a secondary analysisFlowchart of the research design. A total of 369 older adult patients with hip fractures were included in this study. MMSE, Mini-Mental State Examination; POD, postoperative delirium; ICU, intensive care unitBack to article page