The effects of an interactive web-based intervention to promote healthy behaviour

ISRCTN	ISRCTN42687923
DOI	https://doi.org/10.1186/ISRCTN42687923
Protocol serial number	N/A
Sponsor	University of Twente (Netherlands)
Funder	Netherlands Nutrition Centre (Netherlands)

Submission date: 13/08/2009
Registration date: 27/10/2009
Last edited: 06/09/2011

Recruitment status: No longer recruiting
Overall study status: Completed
Condition category: Nutritional, Metabolic, Endocrine

Prospectively registered

Protocol

Statistical analysis plan

Results

Individual participant data

Plain English summary of protocol

Not provided at time of registration

Contact information

Mrs Saskia Kelders
Scientific

Faculty of Behavioural Sciences
Department of PCHR
Ci H403
P.O. Box 217
Enschede
7500AE
Netherlands

Study information

Primary study design	Interventional
Study design	Randomised single blind controlled study
Secondary study design	Randomised controlled trial
Study type	Participant information sheet
Scientific title	The effects of an interactive web-based intervention to promote healthy behaviour: a randomised single-blind study with a waiting list control condition
Study objectives	Respondents who receive access to the interactive web-based intervention will show more improvement in healthy behaviour (nutrition and exercise) than respondents in the waiting-list condition after the intervention period of 12 weeks.
Ethics approval(s)	No ethics approval needed in the Netherlands for this trial on online prevention.
Health condition(s) or problem(s) studied	Healthy nutrition and exercise habits
Intervention	Intervention: Access to interactive web-based application: participants can create a personal account at the intervention website and can use the application as often as they like to for the intervention period of 12 weeks. Control: Waiting-list: participants receive a newsletter (once every 3 weeks) with general information (no information on healthy behaviour). After the intervention period of 12 weeks, they receive access to the application.
Intervention type	Other
Primary outcome measure(s)	1. Nutrition behaviour, measured using 14 item questionnaire of the Netherlands Nutrition Centre at baseline and after 12 weeks 2. Exercise behaviour, measured according to the Dutch Norm for Healthy Exercise (Nederlandse Norm Gezond Bewegen), using a 4-item questionnaire at baseline and after 12 weeks
Key secondary outcome measure(s)	1. Self-efficacy nutrition and exercise, both measured using a 3-item questionnaire (5 point Likert-scale) at baseline and after 12 weeks 2. Knowledge healthy nutrition habits, measured using a 10-item true/false questionnaire based on the Netherlands classification model at baseline and after 12 weeks 3. Knowledge healthy exercise habits, measured using a 10-item true/false questionnaire based on the Dutch norm for healthy exercise at baseline and after 12 weeks 4. Attitude healthy behaviour, measured using a 5-point Likert-scale questionnaire with 5 items on health consciousness attitude and 6 items on health beliefs attitude at baseline and after 12 weeks 5. Stage of change healthy nutrition and exercise, both measured using one item with five distinct answering categories at baseline and after 12 weeks
Completion date	01/06/2009
Reason abandoned (if study stopped)	Eexercise & healthy eating behaviours

Eligibility

Participant type(s)	Patient
Age group	Adult
Lower age limit	18 Years
Sex	All
Target sample size at registration	300
Key inclusion criteria	1. Dutch-speaking 2. Interested in using online lifestyle intervention 3. Access to PC with internet access 4. Aged 18 years and over, either sex
Key exclusion criteria	Body mass index (BMI) less than 18 or more than 28 kg/m^2
Date of first enrolment	01/12/2008
Date of final enrolment	01/06/2009

Locations

Countries of recruitment

Belgium
Netherlands

Study participating centre

Faculty of Behavioural Sciences

Enschede
7500AE
Netherlands

Results and Publications

Individual participant data (IPD) Intention to share	No
IPD sharing plan summary	Not provided at time of registration
IPD sharing plan

Study outputs

Output type	Details	Date created	Date added	Peer reviewed?	Patient-facing?
Results article	results	14/04/2011		Yes	No
Participant information sheet	Participant information sheet	11/11/2025	11/11/2025	No	Yes