{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,10]],"date-time":"2026-03-10T15:26:15Z","timestamp":1773156375036,"version":"3.50.1"},"reference-count":44,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2008,11,17]],"date-time":"2008-11-17T00:00:00Z","timestamp":1226880000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int J Geriat Psychiatry"],"published-print":{"date-parts":[[2009,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objectives<\/jats:title><jats:p>To examine the relationship between use of multiple health services and health utilities, quality of life and other factors in Alzheimer's disease (AD).<\/jats:p><\/jats:sec><jats:sec><jats:title>Design<\/jats:title><jats:p>Data were obtained via caregiver proxy at baseline and 3\u2010 6\u2010 and 9\u2010months post\u2010random assignment among 421 community\u2010dwelling AD patients participating in the CATIE\u2010AD trial of anti\u2010psychotic medications. Service use includes both institutional and outpatient services. Correlates include the AD\u2010Related Quality of Life Scale (ADRQoL), Health Utilities Index (HUI)\u2010III, Neuropsychiatric Inventory, Mini Mental Status Examination, and AD\u2010Cooperative Study Activities of Daily Living Scale. Chi squared tests, <jats:italic>t<\/jats:italic>\u2010tests and logistic regression (using general estimating equations) were used to examine the correlates of service use.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Three quarters (74.2%) used at least one service each month. Average monthly utilization rates for specific service types were: 4.5%, inpatient hospital; 5.6%, nursing home; 3.9%, residential care; 44.0%, AD\u2010related outpatient; 9.4%, mental health outpatient; and 45.5%, medical\u2010surgical outpatient. The likelihood of using any service was higher among older patients [Odds Ratio (OR)\u2009=\u20091.03] and non\u2010Hispanic Whites (OR\u2009=\u20091.61). Each 0.10 increment on the Health Utilities Index (HUI)\u2010III was associated with a 7.0% decrease in the odds of using one or more service (OR\u2009=\u20090.93). The odds of using outpatient and institutional services were 6.0% and 10.0% lower, respectively, for each 0.10 increment on the HUI\u2010III (OR\u2009=\u20090.94, OR\u2009=\u20090.90). The AD\u2010Related Quality of Life Scale proved significantly related to outpatient medical\u2010surgical services only (OR\u2009=\u20091.01).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Findings suggest that the HUI\u2010III could be combined with other known correlates of service use to inform population planning associated with AD. 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