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Individual health promotion on physical activity and nutrition among workers
ISRCTN ISRCTN52854353
DOI 10.1186/ISRCTN52854353
ClinicalTrials.gov identifier
EudraCT number
Public title Individual health promotion on physical activity and nutrition among workers
Scientific title
Acronym N/A
Serial number at source ZonMw: 6230039
Study hypothesis It is hypothesised that long-term electronic communication through the web and e-mails (the Health Portal) provides an efficient means of increasing exposure to advice on healthy behaviour and to facilitate adherence and sustainability.
Lay summary Not provided at time of registration
Ethics approval Approval received from the Medical Ethical Committee of the Erasmus Medical Center on 23rd July 2007 (ref: MEC-2007-113).
Study design Randomised, single blinded, active controlled, parallel group trial
Countries of recruitment Netherlands
Disease/condition/study domain Nutrition, health promotion, physical activity, worksite
Participants - inclusion criteria Eligibility criteria for individual workers are:
1. Paid employment
2. Working at least 12 hours a week
3. Being literate enough to read and understand simple e-mail and internet-based messages in the Dutch language
Participants - exclusion criteria Exclusion criteria for individual workers are:
1. Insufficient Dutch language skills
2. Working less than 12 hours a week
Anticipated start date 01/03/2007
Anticipated end date 28/02/2011
Status of trial Completed
Patient information material
Target number of participants 1400
Interventions 1. Usual care control group:
Standard worksite health promotion program consisting of a questionnaire, a health check with a biometric assessment and access to a restricted part of the Health Portal on the Internet containing personal results on the questionnaire and health check and general information on health.

2. Intervention group:
On top of the standard worksite health promotion program the intervention group will have access to the personalised Health Portal on the Internet, which is built on four critical features:
2.1. Computer-tailored advice on physical activity and nutrition
2.2. Reports on individual progress in self-reported weight, body mass index, physical activity and fruit and vegetable consumption
2.3. Opportunity to contact professionals through e-mail
2.4. Continuous support and feedback through e-mail by a personal coach
After 12 months the monthly contact by a personal coach will be terminated, but access to the Health Portal will remain for another 12 months.

Data will be collected by means of a questionnaire at baseline, and after 12 and 24 months and a health check at baseline and after 24 months.
Primary outcome measure(s) 1. Change in (moderate and vigorous) physical activity level using the International Physical Activity Questionnaire, measured at baseline and after 12 and 24 months
2. Change in level of fruit and vegetable intake using the short Dutch Food Frequency Questionnaire, measured at baseline and after 12 and 24 months
Secondary outcome measure(s) 1. Self-efficacy and perceived barriers on physical activity and fruit and vegetable consumption, measured at baseline and after 12 and 24 months
2. Change in self-reported saturated fat intake, measured at baseline and after 12 and 24 months
3. By using the SCORE system a risk profile on cardiovascular disease, consisting of systolic blood pressure, gender, smoking and total cholesterol level will be assessed, measured only at baseline and after 24 months
4. Body mass index, waist circumference and body fat percentage, measured only at baseline and after 24 months
5. Endurance, measured only at baseline and after 24 months
Sources of funding The Netherlands Organisation for Health Research and Development (ZonMw) (The Netherlands)
Trial website
Publications 2010 results in: http://www.ncbi.nlm.nih.gov/pubmed/20921001
2012 results in: http://www.ncbi.nlm.nih.gov/pubmed/22390886
2012 results in: http://www.ncbi.nlm.nih.gov/pubmed/22350194
2013 results in: http://www.ncbi.nlm.nih.gov/pubmed/22772397
Contact name Ms  S.J.W.  Robroek
  Address Erasmus Medical Centre
Department of Public Health
P.O. Box 2040
  City/town Rotterdam
  Zip/Postcode 3000 CA
  Country Netherlands
  Tel +31 (0)10 4087721
  Email s.robroek@erasmusmc.nl
Sponsor Erasmus Medical Centre (The Netherlands)
  Address Department of Public Health
P.O. Box 2040
  City/town Rotterdam
  Zip/Postcode 3000 CA
  Country Netherlands
  Sponsor website: http://www.erasmusmc.nl/content/englishindex.htm
Date applied 30/05/2007
Last edited 17/03/2014
Date ISRCTN assigned 30/05/2007
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