TY - JOUR T1 - <span hwp:id="article-title-1" class="article-title">A clinical prediction rule based on preoperative factors predicted the development of delirium after cardiac surgery</span><span hwp:id="article-title-2" class="sub-article-title">Commentary</span> JF - Evidence Based Nursing JO - Evid Based Nurs SP - 90 LP - 90 DO - 10.1136/ebn.12.3.90 VL - 12 IS - 3 AU - Irene Travale Y1 - 2009/07/01 UR - http://ebn.bmj.com/content/12/3/90.abstract N2 - Can a clinical prediction rule based on preoperative factors accurately predict the development of delirium after cardiac surgery?Design:2 cohort studies: 1 for derivation and 1 for validation of the prediction model.Setting:2 academic centres and 1 Veterans Administration hospital (derivation set), and 1 academic medical centre and 1 Veterans Administration hospital (validation set).Patients:122 patients (mean age 75 y, 80% men) for the derivation set and 109 patients (mean age 73 y, 73% men) for the validation set. Patients were planning to have cardiac surgery (coronary artery bypass graft [CABG], mitral or aortic valve replacement or repair, or combined CABG-valve). Exclusion criteria included residence &gt;60 miles from study centre, medical … ER -