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Am J Public Health. 1996 Jul;86(7):939-47.

Work site-based cancer prevention: primary results from the Working Well Trial.

Author information

1
Division of Cancer Epidemiology and Control, Boston, MA 02115, USA.

Abstract

OBJECTIVES:

This paper presents the behavioral results of the Working Well Trial, the largest US work site cancer prevention and control trial to date.

METHODS:

The Working Well Trial used a randomized, matched-pair evaluation design, with the work site as the unit of assignment and analysis. The study was conducted in 111 work sites (n = 28,000 workers). The effects of the intervention were evaluated by comparing changes in intervention and control work sites, as measured in cross-sectional surveys at baseline and follow-up. The 2-year intervention targeted both individuals and the work-site environment.

RESULTS:

There occurred a net reduction in the percentage of energy obtained from fat consumption of 0.37 percentage points (P = .033), a net increase in fiber densities of 0.13 g/1000 kcal (P = .056), and an average increase in fruit and vegetable intake of 0.18 servings per day (P = .0001). Changes in tobacco use were in the desired direction but were not significant.

CONCLUSIONS:

Significant but small differences were observed for nutrition. Positive trends, but no significant results, were observed in trial-wide smoking outcomes. The observed net differences were small owing to the substantial secular changes in target behaviors.

PMID:
8669517
PMCID:
PMC1380434
DOI:
10.2105/ajph.86.7.939
[Indexed for MEDLINE]
Free PMC Article

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