The adiposity of children is associated with their lifestyle behaviours: a cluster analysis of school-aged children from 12 nations.

BACKGROUND

The relationship between children's adiposity and lifestyle behaviour patterns is an area of growing interest.

OBJECTIVES

The objectives of this study are to identify clusters of children based on lifestyle behaviours and compare children's adiposity among clusters.

METHODS

Cross-sectional data from the International Study of Childhood Obesity, Lifestyle and the Environment were used.

PARTICIPANTS

the participants were children (9-11 years) from 12 nations (n = 5710).

MEASURES

24-h accelerometry and self-reported diet and screen time were clustering input variables. Objectively measured adiposity indicators were waist-to-height ratio, percent body fat and body mass index z-scores.

ANALYSIS

sex-stratified analyses were performed on the global sample and repeated on a site-wise basis. Cluster analysis (using isometric log ratios for compositional data) was used to identify common lifestyle behaviour patterns. Site representation and adiposity were compared across clusters using linear models.

RESULTS

Four clusters emerged: (1) Junk Food Screenies, (2) Actives, (3) Sitters and (4) All-Rounders. Countries were represented differently among clusters. Chinese children were over-represented in Sitters and Colombian children in Actives. Adiposity varied across clusters, being highest in Sitters and lowest in Actives.

CONCLUSIONS

Children from different sites clustered into groups of similar lifestyle behaviours. Cluster membership was linked with differing adiposity. Findings support the implementation of activity interventions in all countries, targeting both physical activity and sedentary time.