Prevalence of severe childhood obesity in Wales UK

BACKGROUND: In Wales, approximately one in eight children is obese (aged 4-5 years). The aim of this prevalence study was to examine the trends in severe childhood obesity and investigate any relationship with socioeconomic deprivation. METHODS: Data for all children included as part of the Wales Childhood Measurement Programme (2013/14-2017/18) were utilized. Data on the number who had a body mass index above the 99.6th centile indicating severe obesity were calculated over time by sex and in relation to deprivation. RESULTS: Of the 162 208 children measured between 2013/14 and 2017/18 (mean age 5.06 years, standard deviation 0.35 years), the overall prevalence of severe obesity was 3.1% (95% confidence interval [CI] 3.0-3.2%). This varies from 1.9% (95% CI 1.7-2.1%) in the least deprived areas to 3.9% (95% CI 3.7-4.0%) in the most deprived areas. Boys have higher prevalence of severe obesity than girls: 3.6% (95% CI 3.4-3.9%) of boys (n = 598) and 3.0% (95% CI 2.7-3.2%) of girls (n = 467) were categorized as severely obese in reception year in Wales in 2017/18. Prevalence has increased over time but this is not statistically significant. CONCLUSION: This study found significantly higher levels of severe obesity in areas of socioeconomic deprivation. Levels of severe obesity were significantly higher in boys than in girls.