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The incidence of overweight and obesity in children aged three and four in Sweden increased during the pandemic, especially in more deprived areas, a study of just over 25,000 children in three Swedish counties shows.

The study, published in the European Journal of Public Health, is based on data concerning 25,049 children aged three to five who have undergone regular health checks at child health centers. The counties taking part were Dalarna, Jönköping, and Sörmland.

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. In this country, activities at preschool and compulsory school (up to age 16) continued broadly as usual.

The study was headed by Anton Holmgren, doxycycline ww 112 research associate in pediatrics at Sahlgrenska Academy, University of Gothenburg, and Anna Fäldt, researcher in child health and parenthood at Uppsala University.

Significant rise in BMI

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% before to 3.9% during the pandemic. For the boys, the corresponding proportions were 2.4 and 2.6%.

The proportion of three-year-old girls with what is usually classified as normal weight declined from 82.6% before to 80.9% 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% of the girls, while underweight in the boys fell from 2.0 to 1.4%. 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%, while the proportion with normal weight decreased.

More focused measures needed

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 labor-market programs; 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,” notes Anton Holmgren, the study’s corresponding author.

“The study highlights the need for further efforts and interventions aimed at preventing childhood obesity, especially in areas of lower socioeconomic status,” he says.

More information:
Anna Fäldt et al, Increased incidence of overweight and obesity among preschool Swedish children during the COVID-19 pandemic, European Journal of Public Health (2022). DOI: 10.1093/eurpub/ckac181

Journal information:
European Journal of Public Health

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