Impression of COVID-19 lockdown on BMI of overweight and normal-weight kids in Switzerland

In a latest examine posted to the Analysis Sq.* pre-print server and into consideration on the BMC Pediatrics journal, a crew of researchers evaluated the results of the coronavirus illness 2019 (COVID-19)-related lockdown in spring 2020 in Switzerland on the physique mass index (BMI) of youngsters handled for weight problems, compared to earlier instances and with that of normal-weight kids.

Study: Evaluation of the Impact of the COVID-19 Lockdown on BMI in Children and Adolescents with or Without Obesity. Image Credit: Paranyu/ShutterstockExamine: Analysis of the Impression of the COVID-19 Lockdown on BMI in Youngsters and Adolescents with or With out Weight problems. Picture Credit score: Paranyu/Shutterstock

The prevalence of weight problems in kids has turn into an amazing healthcare problem worldwide, significantly in Europe, with prevalence ranges of 20-25%. The lockdown in Switzerland negatively impacted the BMI of youngsters and adults beneath therapy for weight problems; this subset of the inhabitants, in comparison with normal-weight kids and adults, was severely affected by the nationwide cessation of actions, together with the closing of faculties and sports activities golf equipment. Though research have reported modifications in life-style behaviors in overweight kids and adults throughout the lockdown, none monitored their weight; and research reporting weight achieve relied on self-reported weight measurements and never standardized measures.

In regards to the examine

Within the current retrospective examine, researchers collected demographic and anthropometric knowledge of youngsters within the age group of two–18 years with weight problems (topics with weight problems) and the normal-weight kids (management topics) to observe modifications of their BMI and weight achieve throughout their go to to weight problems clinics in Geneva at four-time factors: earlier than and publish the lockdown interval, from March 15 to Could 11, 2020, and on the similar instances throughout 2019.

There have been 47 kids within the overweight group and 20 within the management group. Because the variety of kids in every group impacted the impact dimension of the examine, the authors noticed that the impact dimension was 0.997 (giant) in 2020. It was sufficient to detect a distinction of BMI change of 0.45 ± 0.35 between overweight and management topics.

The researchers famous kids’s age and gender, in addition to physique weight (kg) in gentle garments and top (cm) with out footwear. They calculated physique mass index (BMI) as weight/top squared (kg⋅m-2). Though they used BMI z-score, they used BMI modifications when evaluating normal-weight and weight of overweight topics as BMI z-score is inaccurate to trace modifications in severely overweight kids. BMI z-scores have been derived utilizing the World Well being Group references, with BMI z-score of <-1 customary deviation (SD), -1 to + 1SD, >+ 1SD, >+ 2SD, and > + 3SD indicated underweight, regular weight, chubby, overweight, and extreme weight problems, respectively.

For statistical analyses, the researchers used paired t-tests to evaluate modifications in weight, BMI, and BMI z-score. For drawing evolutionary comparisons of anthropometric knowledge of the 2 examine teams, they used linear and customary a number of regressions; moreover, Chi-square checks or unbiased pupil’s t-tests. Nevertheless, once they used the Pearson correlation coefficient to check teams, variations have been thought-about as vital just for p < 0.05.


On common, a BMI enhance of 0.3 factors each 3 months signifies regular development involving each weight achieve and top enhance. Though the authors famous that weight and BMI elevated for each management topics and topics with weight problems throughout the two studied durations, the rise in magnitude was not the identical between the 2 teams.

Throughout virtually an analogous time interval, in 2019 and 2020, topics with weight problems gained twice as a lot weight as management topics. There might be two possible explanations for this. First, overweight kids have a tendency to realize weight. The second might be that since topics with weight problems have been one yr older, a few of them have been additional alongside within the puberty course of, and grew considerably extra (top +2 cm vs. +1 cm within the management topics), even after age adjustment. Nevertheless, that is simply an assumption, because the authors didn’t make puberty assessments throughout this examine. 

However, weight achieve was extra pronounced within the topics with weight problems. For them, the distinction within the magnitude throughout the 2020 lockdown interval and between 2019 and 2020 was 1.3 kilo in comparison with a distinction of solely 0.5 kilos within the management group. Curiously, an virtually similar magnitude of weight achieve was noticed in grownup research.

Equally, whereas the BMI elevated in each teams in 2019, this enhance was extra pronounced throughout the lockdown in 2020 for topics with weight problems. The modifications in BMI between 2019 and 2020 have been 0.6 factors in topics with weight problems, in comparison with solely 0.05 factors within the management group. Sadly, it was tough for kids and households coping with weight problems points to hunt assist when the surroundings and dwelling circumstances modified drastically because of the COVID-19-related lockdown when no medical help was obtainable.

One other fascinating end result associated to the burden vary or BMI modifications was that topics with weight problems tended to show extra excessive modifications than controls, particularly in 2020. Management topics didn’t present such excessive modifications, struggled much less with meals decisions or portions, and have been nonetheless bodily lively even when their standard bodily actions have been hindered.

As the themes with weight problems additionally elevated their top greater than the controls even after adjustment for age, the BMI evolution was related between the 2 teams in 2019 and 2020, however the distinction virtually reached statistical significance in 2020. Moreover, the distinction in BMI evolution between 2019 and 2020 was not vital when evaluating the 2 teams, even when topics with weight problems appeared to have elevated their BMI extra in 2020 than in 2019.


The examine highlighted the challenges and complexities related to weight problems administration. Contemplating these polarized modifications in each weight achieve and weight reduction within the inhabitants of overweight adults and youngsters in Switzerland, the authors advisable lively help for households with an chubby youngster or adolescent.

*Necessary discover

Preprints with Analysis Sq. publish preliminary scientific experiences that aren’t peer-reviewed and, subsequently, shouldn’t be considered conclusive, information medical observe/health-related conduct, or handled as established info.

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