Evid Based Nurs 3:19 doi:10.1136/ebn.3.1.19
  • Treatment

A worksite health promotion intervention improved employees' nutrition

 QUESTION: Can a worksite health promotion intervention change the physical and social environment related to the dietary and smoking behaviours of employees?


Randomised (allocation not concealed), unblinded, controlled trial with 3 years of follow up (The Working Well Trial).


114 worksites in the US.


20 801 employees (68% men, 92% white) from 114 worksites. Worksites represented areas of manufacturing, communication, public service, and utilities and were matched for size, presence of a cafeteria site, type of smoking policy, company type, sex distribution, blue or white collar predominance, and baseline survey response. Randomisation occurred within matched pairs. Work site follow up was 97% and participant follow up was 88%.


57 worksites (10 071 participants) were allocated to the nutrition and smoking intervention group and 57 (10 730 participants) were allocated to the control group. Interventions aimed to achieve changes in both social norms …

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