School environment and obesity in primary schools. An analysis of the WHO European COSI in Austria

Abstract Background Overweight and obesity in childhood and the associated secondary diseases are constantly on the increase. Studies show that the school environment can have an influence on the weight of children. The Childhood Obesity Surveillance Initiative (COSI) of the WHO is a Europe-wide epidemiological monitoring of anthropometric sizes of school children aged six to nine, with Austria participating in COSI for the first time in 2016. Methods A retrospective secondary data analysis based on two standardized questionnaires was performed. On the one hand, data on determinants specific to the school field were collected, on the other hand anthropometric data of children in third grade were measured. Across Austria, data from 97 schools and 2530 children were collected and evaluated using descriptive and inductive statistical methods. Results In 43,3 % of the schools, an existing playground can be used outside school opening hours. 73,2 % of the schools integrate nutrition education into their school curriculum either as a separate subject or in combination with another subject. Milk and dairy products are available in 60,8 % of schools, fresh fruit in 63,9 % and vegetables in 51,5 %. 28,3 % of the examined, 8 to 9-year-old children are overweight or obese (n = 658), while boys have a significant higher BMI than girls (p < 0,001). Also, in urban areas children have a significant higher BMI on average than in rural areas (p = 0,025). No significant relationship could be identified between the duration of physical education lessons per week and the BMI. However, a significant difference in childreńs BMI became visible when school playgrounds were also accessible outside opening hours (p = 0,018). Conclusions The alarming number of overweight children in Austria should be diminished through policies and further interventions. Schools can make a substantial contribution to this. The course of the development could be closely observed through possible further surveys by COSI. Key messages 73,2% of the schools include nutrition education in their curricula. Yet, about every third Austrian child aged between 8 and 9 is overweight, with boys being significantly more overweight than girls. If school playgrounds are accessible outside opening hours, the childreńs BMI is significantly lower. In urban areas, children have a significantly higher BMI than in rural areas.