Abstract
Background : We evaluated revised Hasegawa's dementia scale (HDS-R) in elderly patients who had operations for gastric cancer or colorectal cancer and we assessed its predictive value in occurrence of postoperative delirium. Method : 121 patients underwent HDS-R test before surgery from Jun., 2006 to Dec., 2007. We assessed age, gender, past history, ASA, PNI, PS, preoperative hospital stay and HDS-R score as preoperative factors. And we also assessed location of cancer, operation time, bleeding, approach, difficulty of surgery, ICU admission, WBC, CRP, morbidity, oral intake as surgical factors. Result : 23 patients (19.0%) developed postoperative delirium. In patients whose HDS-R score was 25 or lower, 14 patients (40.0%) developed postoperative delirium. Univariate analysis identified PNI, HDS-R score, CRP, oral intake as significant factors. But multivariate analysis identified only HDS-R score as independent predictor of occurrence of delirium (OR13.514, 95%CI4.878-37.037, p<0.001). Conclusion : We could conclude that elderly patients whose HDS-R scores were 25 or lower had high risk of postoperative delirium.
