ABSTRACT
AIM: This paper summarised national data on the prevalence of overweight and obesity among 4-year-old children in Sweden in 2020, the first year of the COVID-19 pandemic. It compares this with data from 2018. Differences between regions and sex were identified. METHODS: Comparative data from Swedish Child Health Services were available for 18/21 regions. Chi-square tests were used to compare data from 2018 and 2020 and to examine differences between the sexes. Sex and year were examined through interaction tests. RESULTS: In 2020, 13.3% of the 100 001 children had overweight or obesity: 15.1% of the girls and 11.6% of the boys (p < 0.001). In 2018, 11.4% of the 105 445 children had overweight or obesity: 13.2% of the girls and 9.4% of the boys. This was an overall increase of 16.6% (p = 0.000) in the national Swedish data from 2018 to 2020. The increase between the years was greater for obesity (31.8%, p = 0.000) than for overweight (13.3%, p = 0.000). CONCLUSION: The prevalence of overweight and obesity among 4-year-olds in Sweden increased during the COVID-19 pandemic and needs to be addressed. The prevalence needs to be followed as part of prevention programmes and to evaluate health interventions.