|- candidate number||27923|
|- NTR Number||NTR6719|
|- ISRCTN||ISRCTN no longer applicable|
|- Date ISRCTN created|
|- date ISRCTN requested|
|- Date Registered NTR||16-sep-2017|
|- Secondary IDs||2017.468 METc VUmc|
|- Public Title||The healthy supermarket coach |
|- Scientific Title||The healthy supermarket coach - effects of a nutrition peer education intervention about healthy food purchases in the supermarket |
|- hypothesis||The majority of adolescents in the Netherlands has an inadequate consumption of fruit, vegetables, fibers and an excessive consumption of energy-dense, nutrition-poor foods. Unhealthy diets result in an increased risk of overweight, obesity and nutrition related chronic diseases (NCDs) later in life such as diabetes type 2, cardiovascular diseases and some types of cancer. Therefore, it is important to promote healthier diets among adolescents. Adolescents spend a large amount of their time at school therefore the school environment is an important setting were food consumption takes place. Many Dutch secondary schools in urban areas are surrounded by supermarkets where adolescents frequently purchase unhealthy foods and drinks during school time. Intervening in supermarkets provides an opportunity to promote healthy food purchases among adolescents. It has been shown that peer education -a method in which young people educate their peers- can be used to improve health behaviors among adolescents.|
The aim of this study is to investigate the effects of the healthy supermarket coach - a nutrition peer education workshop about healthy food purchases from young supermarket employees in the supermarket - on determinants of food purchase behavior and actual food purchases in the supermarket during school hours on 12-14 years old adolescents.
Moreover, we evaluated the effects of the healthy supermarket coach on the the young supermarket employees who give the workshops.
|- Healt Condition(s) or Problem(s) studied||Ingestive behaviour|
|- Inclusion criteria||First and second grade students from secondary schools in Amsterdam (the Netherlands) with a supermarket within 5 minutes walking distance who are allowed to leave the schoolbuilding during school breaks. |
16-25 years old young supermarket employees with different cultural and social backgrounds, who are highly motivated to educate their peers about healthy food purchases in the supermarket
|- Exclusion criteria||Not applicable. |
|- mec approval received||yes|
|- multicenter trial||no|
|- Type||Single arm|
|- planned startdate ||1-feb-2018|
|- planned closingdate||30-jun-2018|
|- Target number of participants||1000|
|- Interventions||The intervention - the healthy supermarket coach - consists of a 45-minutes workshop about (un)healthy food purchases from young supermarket employees in the supermarket during school hours. The workshop is developed by the research team in close cooperation with Stichting TeamAlert, a noncommercial communication agency specialized in peer education among children and adolescents, first and second grade students from secondary schools in Amsterdam (the Netherlands) and young supermarket employees of supermarkets in Amsterdam.|
Adolescents from intervention schools receive the workshop. Adolescents from a control school will not not receive the workshop.
|- Primary outcome||- Determinants of purchase behavior in the supermarket (intentions, attitude, nutritional knowledge and social norms)|
- Dietary intake and behaviors during school hours / working hours
- Actual food purchases in the supermarket during school hours
|- Secondary outcome||Evaluation of the healthy supermarket coach on young supermarket employees of the participating supermarkets.|
|- Timepoints||Baseline: before the workshop |
Post-test: two weeks after the workshop
Follow-up: three months after the workshop
- Questionnaires: determinants of purchase behavior in the supermarket and dietary intake and behaviors during school hours / working hours of the adolescents
- Observations in the supermarket: actual food purchases in the supermarket during school hours
|- Trial web site||Not applicable. |
|- CONTACT FOR PUBLIC QUERIES|| Marlijn Huitink|
|- CONTACT for SCIENTIFIC QUERIES|| Marlijn Huitink|
|- Sponsor/Initiator ||Vrije Universiteit Amsterdam|
(Source(s) of Monetary or Material Support)
|Vrije Universiteit Amsterdam, Gemeente Amsterdam, Albert Heijn, Stichting TeamAlert|
|- Publications||Internal presentation: 2018|
Scientific journal: 2018-2019
|- Brief summary||To investigate the effects of the healthy supermarket coach on adolescents an experimental design with a matched control school is used (2 intervention schools, 1 control school).|
Adolescents aged 12-14 years from three secondary schools in Amsterdam (the Netherlands) are included.
Data will be collected by means of questionnaires (baseline, post-test, follow-up) and observations in supermarkets.
Adolescents from intervention schools receive a nutrition peer education workshop about healthy food purchases from two young supermarket employees in the supermarket in close distance to their school. Adolescents participate in the workshop in groups of around fifteen classmates during school lessons related to nutrition and health behavior (e.g. physical education, biology). They complete the baseline questionnaire before they receive the workshop, ranging from a few hours to a few days before the workshop, they complete the post-intervention questionnaire two weeks after the workshop and the follow up three months after the intervention.
The control school receives no workshop. Adolescents from the control school complete both questionnaires at the same times as adolescents from the intervention schools.
Data of food purchases in supermarkets of adolescents from the intervention schools and control school will be collected via observations in supermarkets in close distance to the schools.
To evaluate the intervention among the young supermarket employees they complete the baseline questionnaire before they are trained, the post-test after the intervention and the follow-up three months after the intervention.
|- Main changes (audit trail)|
|- RECORD||16-sep-2017 - 13-okt-2017|