A translational worksite diabetes prevention trial improves psychosocial status, dietary intake, and step counts among employees with prediabetes: A randomized controlled trial

Carla K. Miller, Kellie R. Weinhold, David G. Marrero, Haikady N. Nagaraja, Brian C. Focht

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Objective: 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. Method: 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. Results: 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). Conclusion: 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: ClinicalTrials.gov identifier: NCT01682954.

Original languageEnglish (US)
Pages (from-to)118-126
Number of pages9
JournalPreventive Medicine Reports
StatePublished - Jan 1 2015
Externally publishedYes


  • Dietary intake
  • Goal setting
  • Physical activity
  • Prediabetes
  • Randomized controlled trial
  • Self-efficacy

ASJC Scopus subject areas

  • Health Informatics
  • Public Health, Environmental and Occupational Health

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