Conclusion The nomogram predicting postoperative delirium in patients with total hip replacement based on three independent influencing factors-age，weight and concentration of serum sodium has good applicability，which can provide scientific guidance for the assessment of postoperative delirium in elderly patients.

    【Key words】 the elderly;total hip replacement;postoperative delirium;prediction; nomogram

    术后谵妄是围手术期一个影响广泛的问题 ......