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Spike in obesity among pre-schoolers during pandemic

Written by | 6 Feb 2023 | COVID-19

A new study, published in the European Journal of Public Health based on data from 25,049 children aged three to five, shows an increase in obesity during the COVID-19 pandemic. The new paper is authored by Anton Holmgren, research associate in paediatrics at Sahlgrenska Academy, University of Gothenburg, and Anna Fält, researcher in child health and parenthood at Uppsala University.

Previous studies in this area have often focused on children of school age or in countries with tighter restrictions than Sweden during the COVID-19 pandemic. This paper uses data collected and analysed during regular health checks of pre-school children in three countries: Dalarna, Jönköping, and Sörmland.

The study documents a statistically significant rise in the BMI (body mass index) of three-year-olds during the pandemic. Among the girls, the proportion with obesity rose from 2.8 percent before to 3.9 percent during the pandemic. For the boys, the corresponding proportions were 2.4 and 2.6 percent.

The proportion of three-year-old girls with what is usually classified as normal weight declined from 82.6 percent before the pandemic, to 80.9 percent during the pandemic. There was no corresponding change in normal weight status in the group of three-year-old boys.

Among the four-year-olds, there was a significant increase in BMI. Obesity rose in the girls and boys alike: Overweight rose from 11.1 to 12.8 percent of the girls, while underweight in the boys fell from 2.0 to 1.4 percent. The group of five-year-olds showed no BMI changes.

BMI changes and socioeconomic status were found to be associated, most clearly among children in the most disadvantaged areas. There, the proportion of three- and four-year-olds with overweight rose from 9.5 to 12.4 and with obesity from 2.5 to 4.4 percent, while the proportion with normal weight decreased.

Socioeconomic variables were measured using an established method, the Care Need Index (CNI), which classifies expected care requirements based on education level; the proportion of unemployed or in labour-market programmes; the proportion of single parents; and the proportion born outside the western world.

‘Although Sweden didn’t have a lockdown in the same way as many other countries during the pandemic, the incidence of overweight and obesity increased in three- and four-year-olds, and even at such a young age the socioeconomic differences are evident,’ said Anton Holmgren. ‘The study highlights the need for further efforts and interventions aimed at preventing childhood obesity, especially in areas of lower socioeconomic status.’

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