Adolescent Problem Gaming and Loot Box Purchasing in Video Games: Cross-sectional Observational Study Using Population-Based Cohort Data

Preprints (earlier versions) of this paper are available at https://preprints.jmir.org/preprint/23886, first published August 27, 2020.

Soichiro Ide ^{1
*} , PhD ;   Miharu Nakanishi ^{2
*} , PhD ;   Syudo Yamasaki ² , PhD ;   Kazutaka Ikeda ^{1
*} , PhD ;   Shuntaro Ando ³ , MD, PhD ;   Mariko Hiraiwa-Hasegawa ⁴ , PhD ;   Kiyoto Kasai ³ , MD, PhD ;   Atsushi Nishida ^{2
*} , PhD

¹ Addictive Substance Project, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan

² Research Center for Social Science & Medicine, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan

³ Graduate School of Medicine, University of Tokyo, Tokyo, Japan

⁴ School of Advanced Science, SOKENDAI (Graduate University for Advanced Studies), Kanagawa, Japan

*these authors contributed equally

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