Journal
RESEARCH IN NURSING & HEALTH
Volume 37, Issue 1, Pages 53-64Publisher
WILEY
DOI: 10.1002/nur.21575
Keywords
person-centered analysis; women's health initiative; fatigue; older adults; longitudinal studies; latent class growth model
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Despite the variety of available analytic methods, longitudinal research in nursing has been dominated by use of a variable-centered analytic approach. The purpose of this article is to present the utility of person-centered methodology using a large cohort of American women 65 and older enrolled in the Women's Health Initiative Clinical Trial (N=19,891). Four distinct trajectories of energy/fatigue scores were identified. Levels of fatigue were closely linked to age, socio-demographic factors, comorbidities, health behaviors, and poor sleep quality. These findings were consistent regardless of the methodological framework. Finally, we demonstrated that energy/fatigue levels predicted future hospitalization in non-disabled elderly. Person-centered methods provide unique opportunities to explore and statistically model the effects of longitudinal heterogeneity within a population. (c) 2013 Wiley Periodicals, Inc.
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