TY - JOUR
T1 - Mobility change and covid-19 in japan
T2 - Mobile data analysis of locations of infection
AU - Nagata, Shohei
AU - Nakaya, Tomoki
AU - Adachi, Yu
AU - Inamori, Toru
AU - Nakamura, Kazuto
AU - Arima, Dai
AU - Nishiura, Hiroshi
N1 - Funding Information:
Funding sources: H.N. received funding from the Japan Agency for Medical Research and Development (AMED; JP19fk0108104 and JP20fk0108140). This work was supported by Starting Grants for Research toward Resilient Society (SGRRS), Tohoku University.
Publisher Copyright:
© 2021 Shohei Nagata et al.
PY - 2021/6/5
Y1 - 2021/6/5
N2 - Background: As the COVID-19 pandemic spread, the Japanese government declared a state of emergency on April 7, 2020 for seven prefectures, and on April 16, 2020 for all prefectures. The Japanese Prime Minister and governors requested people to adopt self-restraint behaviors, including working from home and refraining from visiting nightlife spots. However, the effectiveness of the mobility change due to such requests in reducing the spread of COVID-19 has been little investigated. The present study examined the association of the mobility change in working, nightlife, and residential places and the COVID-19 outbreaks in Tokyo, Osaka, and Nagoya metropolitan areas in Japan. Methods: First, we calculated the daily mobility change in working, nightlife, and residential places compared to the mobility before the outbreak using mobile device data. Second, we estimated the sensitivity of mobility changes to the reproduction number by generalized least squares. Results: Mobility change had already started in March, 2020. However, mobility reduction in nightlife places was particularly significant due to the state of emergency declaration. Although the mobility in each place type was associated with the COVID-19 outbreak, the mobility changes in nightlife places were more significantly associated with the outbreak than those in the other place types. There were regional differences in intensity of sensitivity among each metropolitan area. Conclusions: Our findings indicated the effectiveness of the mobility changes, particularly in nightlife places, in reducing the outbreak of COVID-19.
AB - Background: As the COVID-19 pandemic spread, the Japanese government declared a state of emergency on April 7, 2020 for seven prefectures, and on April 16, 2020 for all prefectures. The Japanese Prime Minister and governors requested people to adopt self-restraint behaviors, including working from home and refraining from visiting nightlife spots. However, the effectiveness of the mobility change due to such requests in reducing the spread of COVID-19 has been little investigated. The present study examined the association of the mobility change in working, nightlife, and residential places and the COVID-19 outbreaks in Tokyo, Osaka, and Nagoya metropolitan areas in Japan. Methods: First, we calculated the daily mobility change in working, nightlife, and residential places compared to the mobility before the outbreak using mobile device data. Second, we estimated the sensitivity of mobility changes to the reproduction number by generalized least squares. Results: Mobility change had already started in March, 2020. However, mobility reduction in nightlife places was particularly significant due to the state of emergency declaration. Although the mobility in each place type was associated with the COVID-19 outbreak, the mobility changes in nightlife places were more significantly associated with the outbreak than those in the other place types. There were regional differences in intensity of sensitivity among each metropolitan area. Conclusions: Our findings indicated the effectiveness of the mobility changes, particularly in nightlife places, in reducing the outbreak of COVID-19.
KW - Big data
KW - Communicable diseases
KW - COVID-19
KW - Japan
KW - Mobility
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U2 - 10.2188/jea.JE20200625
DO - 10.2188/jea.JE20200625
M3 - Article
C2 - 33814508
AN - SCOPUS:85104605938
VL - 31
SP - 387
EP - 391
JO - Journal of Epidemiology
JF - Journal of Epidemiology
SN - 0917-5040
IS - 6
ER -