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Biomarker evaluation of different types of Internet-based interactive computer-tailored nutrition education on fat consumption.


- candidate number1998
- NTR NumberNTR623
- ISRCTNISRCTN01557410
- Date ISRCTN created4-apr-2006
- date ISRCTN requested24-mrt-2006
- Date Registered NTR1-mrt-2006
- Secondary IDsN/A 
- Public TitleBiomarker evaluation of different types of Internet-based interactive computer-tailored nutrition education on fat consumption.
- Scientific TitleBiomarker evaluation of different types of Internet-based interactive computer-tailored nutrition education on fat consumption.
- ACRONYMN/A
- hypothesisN/A
- Healt Condition(s) or Problem(s) studiedNo condition, healthy person
- Inclusion criteria1. Age 18 65 years;
2. No prescribed diet from dietician or physician;
3. No treatment for hyper cholesterolaemia;
4. Sufficient understanding of the Dutch language.
- Exclusion criteriaN/A
- mec approval receivedyes
- multicenter trialno
- randomisedyes
- masking/blindingSingle
- controlActive
- groupParallel
- Type2 or more arms, randomized
- Studytypeintervention
- planned startdate 24-mrt-2003
- planned closingdate21-apr-2005
- Target number of participants841
- InterventionsThe study contains 4 experimental conditions and 1 control group:
1. Computer-tailored personal feedback on fat consumption in print form;
2. Computer-tailored personal and normative feedback on fat consumption in print form;
3. Computer-tailored personal, normative and action feedback on fat consumption in print form;
4. Computer-tailored personal, normative and action feedback on fat consumption in web-based form (CD-ROM);
5. Generic information on fat consumption in print form (control group).


All the intervention materials were provided once.
- Primary outcomeTotal fat and saturated fat consumption measured with a validated food frequency questionnaire developed by Wageningen Universityblood lipids (total cholesterol, HDL, LDL, triglycerids) sampling and analyzing conducted by a certified laboratory (Star Rotterdam).
- Secondary outcome1. Intention to change;
2. Proces measures.
- TimepointsN/A
- Trial web siteN/A
- statusstopped: trial finished
- CONTACT FOR PUBLIC QUERIESMPH Willemieke Kroeze
- CONTACT for SCIENTIFIC QUERIESProf. Dr. ir. Johannes Brug
- Sponsor/Initiator Erasmus Medical Center, Department of Public Health
- Funding
(Source(s) of Monetary or Material Support)
ZON-MW, The Netherlands Organization for Health Research and Development
- PublicationsJ Med Internet Res. 2008 Apr 29;10(2):e12.


W.Kroeze, A.M. Werkman, J. Brug. A systematic review on the effectiveness of computer-tailored physical activity and dietary behaviors. (in press). Annals of Behavioral Medicine 2006.
- Brief summaryComputer-tailored health education has been found to be a promising intervention technique to improve a variety of health related behaviors, such as physical activity and dietary behaviors. To be able to improve efficacy, efficiency and applicability of computer-tailored interventions, more in-depth investigations are needed into the most effective delivery forms (print versus interactive), the feedback elements that contribute to efficacy, and whether intervention effects can also be demonstrated using biomarkers as an outcome measure.
The aim of the present study was three-fold:
1. to investigate whether provision of interactive computer-tailored information versus in print format differ in efficacy;
2. to identify the minimally required feedback elements of a computer-tailored intervention;
3. to evaluate the intervention effects using biomarkers as an outcome measure in addition to self-reported behavior.
These research questions were studied in relation to a computer-tailored intervention aimed at fat intake. Fat intake is an important behavioral risk factor and computer-tailored interventions have been found most effective in reducing fat intake. The study was conducted among healthy adults recruited from nine companies and two communities in the area of Rotterdam.
- Main changes (audit trail)
- RECORD1-mrt-2006 - 14-aug-2008


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