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Activity Number:
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531
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Type:
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Topic Contributed
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Date/Time:
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Thursday, August 2, 2007 : 10:30 AM to 12:20 PM
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Sponsor:
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ENAR
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| Abstract - #308483 |
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Title:
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A Longitudinal Mediational Model To Assess the Indirect Effect of Adolescent-Physical Activity in Young Adult-Physical Activity Between Males and Females
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Author(s):
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Kang Sun*+ and Vincent C. Arena
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Companies:
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University of Pittsburgh and University of Pittsburgh
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Address:
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Department of Biostatistics, Graduate School of Public Health, Pittsburgh, PA, 15203,
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Keywords:
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Abstract:
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Mediational analysis is used to explain "how" a predictor affects an outcome through an intervening variable called a mediator. A mediational analysis can be based on longitudinal modeling. We describe one such analysis using data from the Adolescent Injury Control Study where 1245 adolescents were followed from adolescence (Phase I) to young adulthood (Phase II). Physical activity hours and several risk factors were surveyed annually. A longitudinal mediation model is used to examine the role of adolescents-physical activity (mediator) in the relationship between gender (predictor) and the physical activity in young adults (outcome). The initial status and changes in the mediator and the outcome are included in one multivariate mediational model. The indirect effect of the mediator is assessed by the latent growth curve modeling techniques.
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