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. 2022 May;17(5):e12874.
doi: 10.1111/ijpo.12874. Epub 2021 Dec 22.

Changes in obesity and lifestyle behaviours during the COVID-19 pandemic in Chinese adolescents: A longitudinal analysis from 2019 to 2020

Dongling Yang  1 , Chunyan Luo  1 , Xiaogang Feng  1 , Wenjuan Qi  1 , Shuangxiao Qu  1 , Yuefang Zhou  1 , Lijing Sun  1 , Huanyu Wu  2
Affiliations

Changes in obesity and lifestyle behaviours during the COVID-19 pandemic in Chinese adolescents: A longitudinal analysis from 2019 to 2020

Dongling Yang et al. Pediatr Obes. 2022 May.

Abstract

Background: Since December 2019, the coronavirus disease 2019 (COVID-19) has become a global pandemic. Currently, the COVID-19 pandemic is still ongoing. What changes have taken place in the obesity and obesity-related lifestyle behaviours of adolescents during the first year of the COVID-19 pandemic?

Objective: This study aims at analysing the changes in obesity and lifestyle behaviours of Chinese adolescents before and 1 year after the outbreak of the COVID-19 pandemic, providing evidence for the global strategies to respond to the impact of the COVID-19 pandemic on adolescent obesity.

Methods: Physical examinations and student health and influencing factors questionnaires were conducted among 6047 adolescents aged 11-16 years by health professionals in Shanghai, China, before the COVID-19 pandemic (September-November of 2019) and 1 year after the outbreak of the COVID-19 pandemic (September-November of 2020). Paired χ2 tests, paired t-tests or Wilcoxon signed-rank test was used to evaluate the changes in the obesity prevalence, BMI and lifestyle behaviours from 2019 to 2020.

Results: 1 year after the outbreak of the COVID-19 pandemic, the obesity prevalence of Chinese adolescents rose from 14.2% to 15.4% (p < 0.01), mainly because of the increase in boys. And the average BMI increased from 20.3 to 21.2 kg/m2 (p < 0.01). Their lifestyle behaviours have also significantly changed. The mobile screen time increased from 0.25-1.50 h/day to 0.33-2.00 h/day (p < 0.01). The proportion of adolescents who participated in MVPA for ≥60 min/day on all 7 days during the past week dropped from 14.4% to 11.7% (p < 0.01). The generalized estimation equation analysis indicated that adolescents who participated in MVPA for ≥60 min/day on all 7 days had a lower likelihood of having obesity. Boys with computer time ≥2 h/day and girls with mobile screen time ≥2 h/day or TV time ≥2 h/day had a higher likelihood of having obesity.

Conclusion: This study found that 1 year after the outbreak of the COVID-19 pandemic, the BMI and obesity prevalence of Chinese adolescents increased and obesity-related lifestyle behaviours have also changed.

Keywords: COVID-19; adolescents; lifestyle behaviours; longitudinal analysis; obesity.

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Conflict of interest statement

The authors have no conflicts of interest relevant to this article to disclose.

Figures

FIGURE 1
FIGURE 1
Flow chart of the participants' selection and data extraction and matching from the surveillance of the Students' Common Diseases and Health Influencing Factors in Shanghai, China, 2019–2020
FIGURE 2
FIGURE 2
Changes in BMI of Chinese adolescents with different characteristics from 2019 to 2020. From 2019 to 2020, the average BMI of adolescents in overall, different districts, different age groups, and different household incomes all have a significant increase (p < 0.01). The increase in BMI of boys was greater than that of girls, and the younger the age groups, the greater the increase in BMI
See this image and copyright information in PMC

References

    1. Ng M, Fleming T, Robinson M, et al. Global, regional, and national prevalence of overweight and obesity in children and adults during 1980‐2013: a systematic analysis for the Global Burden of Disease Study 2013. The Lancet. 2014;384(9945):766‐781. 10.1016/s0140-6736(14)60460-8 - DOI - PMC - PubMed
    1. NCD Risk Factor Collaboration (NCD‐RisC) . Worldwide trends in body‐mass index, underweight, overweight, and obesity from 1975 to 2016: a pooled analysis of 2416 population‐based measurement studies in 128·9 million children, adolescents, and adults. Lancet. 2017;390(10113):2627‐2642. 10.1016/S0140-6736(17)32129-3 - DOI - PMC - PubMed
    1. Dong Y, Jan C, Ma Y, et al. Economic development and the nutritional status of Chinese school‐aged children and adolescents from 1995 to 2014: an analysis of five successive national surveys. Lancet Diabetes Endocrinol. 2019;7(4):288‐299. - PubMed
    1. Llewellyn A, Simmonds M, Owen CG, Woolacott N. Childhood obesity as a predictor of morbidity in adulthood: a systematic review and meta‐analysis. Obes Rev. 2016;17(1):56‐67. - PubMed
    1. Weihrauch‐Bluher S, Kromeyer‐Hauschild K, Graf C, et al. Current guidelines for obesity prevention in childhood and adolescence. Obes Facts. 2018;11(3):263‐276. - PMC - PubMed

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