Page 79 - ON THE WAY TO HEALTHIER SCHOOL CANTEENS - Irma Evenhuis

findings, school canteen advisors provided tailored advice in an advisory meeting where all involved stakeholders discussed aims and actions to achieve a healthier canteen. Stakeholders also received communication materials about the Guidelines for Healthier Canteens, including a brochure with examples of, and advice on, how to promote healthier products. All stakeholders of all intervention schools were invited to a closed Facebook community to share experiences, ask questions and to support each other. In addition, to remind and motivate stakeholders, a newsletter with information and examples was sent by email once every 6 weeks. Finally, to gain insight into their students’ opinion, students were asked to fill in a questionnaire (the same as used for the effect evaluation), and the results were fed back to schools in an attractive fact sheet.
ENROLMENT
Assessed for eligibility (n = 155)
Included (n = 21)
Excluded (n = 134)
- Not meeting inclusion criteria (n = 44) - Declined to participate (n = 46)
- Other reasons (n = 44)
ALLOCATION
Allocated to intervention (n = 11, students = 948) - Received allocated condition (n = 10)
- Did not receive allocated condition, due to
organisational problems (n = 1)
Matched to control (n = 10, students = 943)
- Received allocated condition (n = 10)
- Did not receive allocated condition (n = 0)
FOLLOW-UP AT 6 MONTHS
10 schools, 864 students 10 schools, 868 students
Lost to follow-up (School = 0, students = 84) Lost to follow-up (School = 0, students = 75)
ANALYSIS
Analysed (n = 645)
Excluded from analysis (n = 234)
- No permission to use data (n = 5)
- Missing data on T0 or T1 (n = 125)
- Due to zero purchases registered before and
after intervention (n = 94)
Analysed (n =731)
Excluded from analysis (n = 160)
- No permission to use data (n = 17)
- Missing data on T0 or T1 (n = 39)
- Due to zero purchases registered before and
after intervention (n = 98)
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Figure 5.1 The CONSORT flow diagram of the present study [185].
Measurements
Measurements in the school canteens and among students were performed before and directly after the intervention period. The “health level” of the school canteen was measured in all participating schools using the online Canteen Scan [100], filled out by a school canteen advisor. The tool has been evaluated satisfactorily on inter-rater reliability and criterium validity if measured by a school canteen advisor, scoring > 0.60 on Weighted
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