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Balance@Work: the (cost)-effectiveness of an occupational health guideline to improve physical activity and dietary behaviour among workers in order to prevent weight gain
ISRCTN ISRCTN73545254
DOI 10.1186/ISRCTN73545254
ClinicalTrials.gov identifier
EudraCT number
Public title Balance@Work: the (cost)-effectiveness of an occupational health guideline to improve physical activity and dietary behaviour among workers in order to prevent weight gain
Scientific title The (cost)-effectiveness of an occupational health guideline to improve physical activity and dietary behaviour among workers in order to prevent weight gain: a randomised, controlled, parallel group, single blinded trial
Acronym Balance@Work
Serial number at source NTR1190
Study hypothesis The intervention group, receiving a lifestyle intervention, is expected to significantly improve their daily physical activity and dietary behaviour, and thus prevent weight gain compared to the control group at the short (6 months) and the longer term (12 months).
Lay summary Not provided at time of registration
Ethics approval Ethics Committee of the VU University Medical Centre ('Medisch Ethische Toetseingscommissie VU medisch centrum') approved on the 7th May 2009 (ref: 2009/002).
Study design Randomised controlled parallel group single blinded trial
Countries of recruitment Netherlands
Disease/condition/study domain Obesity prevention
Participants - inclusion criteria 1. Workers who do not comply to Dutch physical activity and nutrition guidelines, and/or workers who are overweight
2. Aged 18 - 55 years, either sex
Participants - exclusion criteria 1. Unable to be physically active
2. Not sufficiently capable of using the Dutch language
3. Not having signed an informed consent form
4. Sick leave for the last 3 weeks
Anticipated start date 01/06/2009
Anticipated end date 01/06/2011
Status of trial Completed
Patient information material Not available in web format, please use the contact details below to request a patient information sheet
Target number of participants 600
Interventions The intervention is aimed at physical activity and dietary behaviour (both sides of the energy balance) in order to prevent weight gain. Using social ecological models and implementation intentions, respondents receive a tailored intervention by means of counselling based on motivational interviewing by occpational physicians. The control group receives care as usual.

Treatment in the intervention group is 6 months. Follow-up measurements in both groups take place at 6, 12, and 18 months after baseline.
Primary outcome measure(s) 1. Physical activity, measured with the Squash questionnaire at baseline, 6, 12, and 18 months
2. Dietary behaviour, measured with the Short Fruit and Vegetable questionnaire and the Fat list at baseline, 6, 12, and 18 months
3. Waist circumference, measured with the Seca 201 waist circumference measure at baseline, 6, 12, and 18 months
4. Body weight at baseline, 6, 12, and 18 months
Secondary outcome measure(s) 1. General health status (sedentary behaviour measured with the International Physical Activity Questionnaire [IPAQ], anthropometrics [body weight, body height, blood pressure and cholesterol] measured retrospectively) at baseline, 6, 12, and 18 months
2. Quality of life, measured with the EQ-5D questionnaire at baseline, 6, 12, and 18 months
3. Cardiovascular disease risk profile, calculated following SCORE at baseline, 6, 12, and 18 months
4. Sick leave, measured with the HPQ questionnaire at 3, 6, 9, 12, 15, and 18 months
5. Cost-effectiveness, measured with EQ-5D and HPQ data at 3, 6, 9, 12, 15, and 18 months
Sources of funding The Netherlands Organisation for Health Research and Development (ZonMw) (Netherlands) (ref: 120510007)
Trial website http://www.balanceatwork.org
Publications 1. 2009 results in http://www.ncbi.nlm.nih.gov/pubmed/20003405
2. 2012 results in http://www.ncbi.nlm.nih.gov/pubmed/22383591
3. 2013 results in http://www.ncbi.nlm.nih.gov/pubmed/23288297
Contact name Ms  Lisanne  Verweij
  Address Vrije University Medical Center
EMGO+ Institute
Van der Boechorststraat 7
  City/town Amsterdam
  Zip/Postcode 1081 BT
  Country Netherlands
  Tel +31 (0)20 444 9681
  Fax +31 (0)20 444 8387
  Email l.verweij@vumc.nl
Sponsor Vrije University Medical Centre (VUMC) (Netherlands)
  Address EMGO+ Institute
Van der Boechorststraat 7
  City/town Amsterdam
  Zip/Postcode 1081 BT
  Country Netherlands
  Tel +31 (0)20 444 9681
  Fax +31 (0)20 444 8387
  Email emgo@vumc.nl
  Sponsor website: http://www.vumc.nl/english/
Date applied 27/07/2009
Last edited 06/01/2014
Date ISRCTN assigned 02/09/2009
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