O lder people are the most frequent users of health services, and the progressive aging of the world's population may lead to a saturation of available services. Therefore, we must find ways to reduce preventable admissions to hospital and uncover the factors associated with potentially preventable use of health services. An association between depression and hospital admission for nonpsychiatric conditions has been postulated, although the data have been limited to specific clinical populations and the interpretation of the results hampered by the retrospective study design and the use of self-reported outcomes.1-8 Consequently, these findings cannot be easily generalized or used to develop data-driven interventions.We addressed this gap in the literature by using a community-based population survey with prospective data linkage to measure important health-related outcomes. Our main objective was to investigate whether community-dwelling older men with depressive symptoms were more likely than nondepressed men to be admitted to general hospitals. Our other aims were to determine whether the long-term clinical outcomes of these 2 groups differed in relation to the number of future hospital admissions, length of hospital stay and inpatient deaths.
Methods
Patient sampleWe identified and selected participants from a community-derived sample of 5585 men living in Perth, Western Australia, who collectively compose the Health in Men Study cohort. The Health in Men Study is a prospective, follow-up study involving men aged 69 years and older who participated in an earlier trial of screening for abdominal aortic aneurysm. The full details of the cohort, including assessment procedures and enrolment are available elsewhere. 9 In brief, 19 352 men aged 65-83 years were randomly selected between Apr. 1, 1996, and Jan. 31, 1999, from the electoral roll (enrolment is mandatory for Australian citizens) and invited to participate in the study. A total of 12 203 men completed the full questionnaire, which covered aspects of their lifestyle and medical history. The surviving men were invited to parAssociation between depression and hospital outcomes among older men