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Association between refraining from going out and weight gain after the spread of COVID-19 infection in Japan: JACSIS study
Journal of the National Institute of Public Health ; 71(4):357-367, 2022.
Article in Japanese | GIM | ID: covidwho-2262184
ABSTRACT

Objectives:

In April 2020, a state of emergency was declared regarding COVID-19, and refraining from going out was requested. Although there is concern about weight gain after the spread of the infection, there are few reports of studies in Japan. The present study examined the association between refraining from going out and weight gain after the spread of COVID-19 infection.

Methods:

Cross-sectional and longitudinal analyses were conducted. Cross-sectional Data from an internet survey conducted in August 2020 among the general population in Japan were used. Of the 25482 valid responses, 18116 persons aged 20-64 were included in the analysis. Information on refraining from going out was ascertained by a self-administered questionnaire. The outcome variable, subjective weight gain, was categorized as "increased" or "same as before/reduced" based on the question of subjective weight change in the last month compared to before January 2020. Longitudinal In addition to cross-sectional data, data from the February 2019, February 2020, and February 2021 surveys were collated;4399 individuals participated in all four time points, of which 4337 were included in the analysis after excluding outliers. Two outcome variables were used (1) weight change of "> 0 kg" from February 2020 to February 2021, and (2) weight change of "> 0 kg" from February 2020 to February 2021 and subjective weight change of "increased". Logistic regression analysis was used for analysis, adjusting for sex, age, occupation, hospitalization, breakfast deprivation, and snacking (in the longitudinal, the rate of weight change in the year before baseline was also adjusted). In addition, the indirect effect of snacking was examined using the Sobel test.

Results:

Cross-sectional 5168 (28.5%) of 18116 subjects reported weight gain. Multivariate-adjusted odds ratios (95% confidence intervals) for weight gain in comparison with "never refrained" were 1.46 (1.16-1.83) for "almost never refrained," 1.87 (1.54-2.27) for "sometimes refrained," and 2.07 (1.71-2.51) for "always refrained" (p-trend < 0.001). Snacking had a significant indirect effect on the association between refraining from going out and weight gain (p < 0.001). Longitudinal (1) No significant association was found (p-trend =0.401). Longitudinal (2) Similar to the cross-sectional, we found a significant association (p-trend =0.003) and a significant indirect effect of snacking (p < 0.001).

Conclusions:

Our results implied that refraining from going out after the spread of COVID-19 infection contributed to weight gain, and snacking mediated this association.
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Collection: Databases of international organizations Database: GIM Language: Japanese Journal: Journal of the National Institute of Public Health Year: 2022 Document Type: Article

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Collection: Databases of international organizations Database: GIM Language: Japanese Journal: Journal of the National Institute of Public Health Year: 2022 Document Type: Article