An Association of Influenza Epidemics in Children With Mobile App Data: Population-Based Observational Study in Osaka, Japan

Yusuke Katayama   ¹ , MD, PhD ;   Kosuke Kiyohara   ² , DrPH ;   Tomoya Hirose   ¹ , MD, PhD ;   Kenichiro Ishida   ³ , MD ;   Jotaro Tachino   ¹ , MD, PhD ;   Shunichiro Nakao   ¹ , MD, MSc, PhD ;   Tomohiro Noda   ⁴ , MD ;   Masahiro Ojima   ³ , MD ;   Takeyuki Kiguchi   ⁵ , MD, PhD ;   Tasuku Matsuyama   ⁶ , MD, PhD ;   Tetsuhisa Kitamura   ⁷ , MD, DrPH

¹ Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Suita, Japan

² Department of Food Science, Faculty of Home Economics, Otsuma Women's University, Tokyo, Japan

³ Department of Acute Medicine and Critical Care Center, Osaka National Hospital, National Hospital Organization, Osaka, Japan

⁴ Department of Traumatology and Critical Care Medicine, Osaka City University Graduate School of Medicine, Osaka, Japan

⁵ Division of Trauma and Surgical Critical Care, Osaka General Medical Center, Osaka, Japan

⁶ Department of Emergency Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan

⁷ Division of Environmental Medicine and Population Sciences, Department of Social and Environmental Medicine, Osaka University Graduate School of Medicine, Suita, Japan