Using baseline data on the 5,151 respondents surveyed as part of the panel design of the Longitudinal Study on Aging (LSOA), this article estimates, cross-sectionally, the relationships hypothesized in the behavioral model of health services utilization. In addition to the traditional indicators of the predisposing, enabling, and need characteristics, the richness of the LSOA permits the inclusion of measures of multigenerational living arrangements, kin and nonkin social supports, health worries and the sense of health control, health insurance coverage, residential stability, and several multiple-item scales of functional limitations. Despite these innovations, the ability of the behavioral model to accurately predict the use of health services by older adults remains relatively unchanged. Important conceptual clarifications involving the hypothesized relationships, however, are identified and discussed.
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