Impact on Drinking Behaviour in Sixth-grade Students Through Changing the School Environment

Not Applicable

Terminated

• Conditions: Students of the 6. Grade
• Interventions: Dietary Supplement: sugar reduction

• Registration Number: NCT04165304
• Lead Sponsor: Special Institute for Preventive Cardiology And Nutrition

Brief Summary

This study evaluates the effect of changes in the range of drinks offered in vending machines in schools on the sugar intake of pupils via drinks.

Detailed Description

Children and adolescents consume a considerable amount of liquid in the form of sugary drinks. A high sugar diet associated not only with the increase in overweight children, but also with type II diabetes, cardiovascular disease and cancer.

In many schools, cold drink vending machines with different fillings are available offering various sugary drinks.

Participating schools will be randomised in a ratio of 1:1:1 into three groups. In one intervention group, the vending machines will be re-equipped to contain 60% drinks containing a maximum of 6.7g sugar/100ml, 20% drinks containing more than 6.7g sugar/100ml and 20% water. In the second intervention group, the vending machines offer 80% water, 20% products with a maximum of 6.7g sugar/100ml. In the control group, the range of products offered by the vending machines remains unchanged. Information of the students drinking habits, total fluid intake and sugar intake in the form of food and drinks will be collected. In addition, data such as body height, body weight, physical activity and socio-democratic or socio-economic data will be accumulated. The sales figures of the drinks in the vending machines will be recorded and information about the surroundings of the schools (fast food chains, supermarkets, etc.) will be collected.

The survey of students and data collection will be repeated three times. In a sub-study, demographic data and the frequency of consumption of sugared beverages and water are collected from 2 focus groups. In addition, participants will complete a questionnaire on general attitudes towards sugary drinks or water, obstacles to and incentives for reducing sugar consumption by liquids or increasing water consumption.

Study Timeline

• Status Verified: 2019-11
• Study First Submitted: 2019-11-11
• Study Start: 2019-11-13
• Study First Submitted QC: 2019-11-14
• Study First Posted: 2019-11-15
• Primary Completion: 2020-03-30
• Study Completion: 2020-03-30
• Last Update Submitted: 2020-04-09
• Last Update Posted: 2020-04-13

Recruitment & Eligibility

• Status: TERMINATED
• Sex: All
• Target Recruitment: 431

Inclusion Criteria

• Students in one of the recruited schools
• Appropriate knowledge of the German language

Exclusion Criteria

• No signed consent of parent and of child

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Intervention group 1	sugar reduction	vending machines will be re-equipped to contain 60% drinks containing a maximum of 6.7g sugar/100ml, 20% drinks containing more than 6.7g sugar/100ml and 20% water
Intervention group 2	sugar reduction	In the second intervention group, the vending machines offer 80% water and 20% products with a maximum of 6.7g sugar/100ml.

Primary Outcome Measures

Name	Time	Method
Consumption of mean liquid free sugar intake per week (g) by using the 7-day fluid record	1 week	self report of fluid consumption

Secondary Outcome Measures

Name	Time	Method
Absolute (mL) and relative (%) contribution of each fluid intake category to total fluid intake by using the 7-day fluid record	1 week	self report of fluid consumption, the measure presents only one outcome "fluid intake", which will be reported in "ml" and "%".
Water intake by using the 7-day fluid record with the proportion of children meeting the EFSA adequate intake for water from fluids	1 week	self report of fluid consumption
Consumption of free sugar from food by 24-h dietary recall	24 hours	self report of food consumption
Body weight and Body-Mass-Index (BMI) by using body weight and height	Start, 3-4 months, 7-8 months	Measured with a calibrated body scale in light clothes and without shoes
Abdominal girth	Start, 3-4 months, 7-8 months	inelastic tape
Physical activity	Start, 3-4 months, 7-8 months	International Physical Activity Questionnaire for Adolescents (IPAQ-A), scale title "Physical activity of adolescents", scale minimum "0", scale maximum "7", higher scores mean a better outcome
Socio-demographic and socioeconomic factors	after 7-8 months	questionnaire, scale title "socio-demographic and socio-econimoc status", scale minimum is "0", scale maximum is "3", higher scores mean a better outcome
Sales data (frequencies of beverages) of the vending machine and school cafeteria operators	through study completion, an average of 8 month	Interview

Trial Locations

Locations (15)

BG/BRG Zehnergasse; 🇦🇹 Wr. Neustadt, Lower Austria, Austria

GWIKU 18 Haizingergasse; 🇦🇹 Vienna, Austria

NMS Liezen; 🇦🇹 Liezen, Styria, Austria

BRG Marchettigasse; 🇦🇹 Vienna, Austria

Bischöfliches Gymnasium Graz; 🇦🇹 Graz, Styria, Austria

NMS Lanzenkirchen; 🇦🇹 Lanzenkirchen, Lower Austria, Austria

Sport-Mittelschule Matzen-Raggendorf; 🇦🇹 Matzen, Gänserndorf, Austria

NMS II Spittal/Drau; 🇦🇹 Spittal An Der Drau, Carinthia, Austria

BG/BRG Wels; 🇦🇹 Wels, Upper Austria, Austria

GRG II Zirkusgasse; 🇦🇹 Vienna, Austria

GRG Gottschalkgasse; 🇦🇹 Vienna, Austria

LWS Donaustadt; 🇦🇹 Vienna, Austria

GRG 23; 🇦🇹 Vienna, Austria

NMS St. Veit/Glan; 🇦🇹 St. Veit an der Glan, Carinthia, Austria

Gymnasium Bad Vöslau/Gainfard; 🇦🇹 Bad Vöslau, Lower Austria, Austria