NDLI: Intervention-mediated effects for adult physical activity: A latent growth curve analysis.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Roesch, Scott C. Norman, Greg J. Villodas, Feion Sallis, James F. Patrick, Kevin
Description	Country affiliation: United States Author Affiliation: Roesch SC ( San Diego State University, Psychology, 5500 Campanile Drive, San Diego, CA 92120, United States. scroesch@sciences.sdsu.edu)
Abstract	Data from two randomized clinical trials (RCT) were used to examine the extent to which a health promotion intervention affected changes in growth trajectories of psychosocial constructs and if so, whether these constructs in turn explained changes in physical activity (PA). PA and psychosocial measures on 842 overweight adults in the United States were collected in two RCTs evaluating Internet-based behavior change interventions with assessments at baseline, 6 and 12 months. A physical activity latent variable at 12 months was created using indicators of self-reported walking and leisure time activities. Intervention-mediated effects on PA at 12 months were found via latent growth curves representing self-efficacy and behavioral strategies, where increasing growth curves across time were associated with higher PA values at 12 months. These findings provide some evidence that web-based self-help intervention programs worked through targeted behavior change constructs to influence physical activity levels in overweight adults.
File Format	HTM / HTML
ISSN	02779536
e-ISSN	18735347
DOI	10.1016/j.socscimed.2010.04.032
Journal	Social Science & Medicine
Issue Number	3
Volume Number	71
Language	English
Publisher	Elsevier
Publisher Date	2010-08-01
Publisher Place	Great Britain (UK)
Access Restriction	Open
Subject Keyword	Discipline Medicine Computer-assisted Instruction Psychology Health Promotion Therapy Program Evaluation Psychology, Social Randomized Controlled Trials As Topic Self Efficacy Questionnaires Evaluation Studies Research Support, N.i.h., Extramural
Content Type	Text
Resource Type	Article
Subject	Medicine Health (social science) History and Philosophy of Science

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