{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T23:10:01Z","timestamp":1792451401070,"version":"4.5.0"},"reference-count":28,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2006,4,12]],"date-time":"2006-04-12T00:00:00Z","timestamp":1144800000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J American Geriatrics Society"],"published-print":{"date-parts":[[2006,5]]},"abstract":"<jats:p>\n                    <jats:bold>OBJECTIVES:<\/jats:bold>\n                    To evaluate risk factors for postoperative delirium in a cohort of elderly hip\u2010surgery patients and to validate a medical risk stratification model.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>DESIGN:<\/jats:bold>\n                    Prospective cohort study.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>SETTING:<\/jats:bold>\n                    Medical school\u2013affiliated general hospital in Alkmaar, the Netherlands.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>PARTICIPANTS:<\/jats:bold>\n                    Six hundred three hip\u2010surgery patients aged 70 and older screened for risk factors for postoperative delirium.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>MEASUREMENTS:<\/jats:bold>\n                    Predefined risk factors for delirium were assessed on admission. One point was assigned for each of four risk factors present, resulting in three groups: low, intermediate, and high risk. Baseline screening and assessment included the Mini\u2010Mental State Examination, the standardized Snellen test for visual impairment, chart review to determine Acute Physiological and Chronic Health Evaluation II score, and blood urea nitrogen to creatinine ratio. The primary outcome was postoperative delirium, as defined using Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, and Confusion Assessment Method criteria. All patients were screened daily for delirium.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>RESULTS:<\/jats:bold>\n                    Incidence of delirium was 3.8% in the low\u2010risk group (\n                    <jats:italic>P<\/jats:italic>\n                    &lt;.001), 11.1% in the intermediate\u2010risk group (\n                    <jats:italic>P<\/jats:italic>\n                    =.27, relative risk (RR)=3.0), and 37.1% in the high\u2010risk group (\n                    <jats:italic>P<\/jats:italic>\n                    &lt;.001, RR=9.8). Cognitive impairment at admission had the highest predictive value for postoperative delirium (coefficient of determination=0.15). Contrary to previous findings, age was an independent predictive factor for delirium. Moreover, postoperative delirium was four times as frequent in acute patients as in elective hip\u2010replacement patients.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>CONCLUSION:<\/jats:bold>\n                    The medical risk factor model is valid for elderly hip\u2010surgery patients. Cognitive impairment, age, and type of admission are important risk factors for delirium in this surgical population.\n                  <\/jats:p>","DOI":"10.1111\/j.1532-5415.2006.00704.x","type":"journal-article","created":{"date-parts":[[2006,4,23]],"date-time":"2006-04-23T11:45:36Z","timestamp":1145792736000},"page":"817-822","source":"Crossref","is-referenced-by-count":209,"title":["Risk Factors and Prediction of Postoperative Delirium in Elderly Hip\u2010Surgery Patients: Implementation and Validation of a Medical Risk Factor Model"],"prefix":"10.1111","volume":"54","author":[{"given":"Kees J.","family":"Kalisvaart","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ralph","family":"Vreeswijk","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos F. 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