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Prev Med Rep. 2015;2:118-126.

A Translational Worksite Diabetes Prevention Trial Improves Psychosocial Status, Dietary Intake, and Step Counts among Employees with Prediabetes: A Randomized Controlled Trial.

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Professor, Department of Human Sciences, Human Nutrition, Ohio State University, 1787 Neil Ave., 325 Campbell Hall, Columbus, OH 43210, USA, T: 614-292-1391.
Graduate Research Assistant, Department of Human Sciences, Human Nutrition.
J.O. Ritchey Endowed Professor of Medicine, Indiana University School of Medicine, 410 W. 10 Street, Room 1140, Indianapolis, IN 46202, USA.
Professor, Division of Biostatistics, College of Public Health.
Associate Professor, Department of Human Sciences, Kinesiology.



Few worksite trials have examined the impact of diabetes prevention interventions on psychological and behavioral outcomes. Thus, the impact of a worksite lifestyle intervention on psychosocial outcomes, food group intake, and step counts for physical activity (PA) was evaluated.


A randomized pretest/posttest control group design with 3-month follow-up was employed from October 2012 to May 2014 at a U.S. university worksite among employees with prediabetes. The experimental group (n=35) received a 16-week group-based intervention while the control group received usual care (n=33). Repeated measures analysis of variance compared the change in outcomes between groups across time.


A significant difference occurred between groups post-intervention for self-efficacy associated with eating and PA; goal commitment and difficulty; satisfaction with weight loss and physical fitness; peer social support for healthful eating; generation of alternatives for problem solving; and intake of fruits, meat, fish, poultry, nuts, and seeds (all ps < .05). The experimental group significantly increased step counts post-intervention (p = .0279) and were significantly more likely to report completing their work at study end (p = .0231).


The worksite trial facilitated improvement in modifiable psychosocial outcomes, dietary patterns, and step counts; the long-term impact on diabetes prevention warrants further investigation.

TRIAL REGISTRATION: identifier: NCT01682954.


dietary intake; goal setting; physical activity; prediabetes; randomized controlled trial; self-efficacy

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