App-Based Ecological Momentary Assessment of Problematic Smartphone Use During Examination Weeks in University Students: 6-Week Observational Study

Ji Seon Ahn   ^{1, 2, 3} , PhD ;   InJi Jeong   ⁴ , BS ;   Sehwan Park   ⁵ , MA ;   Jooho Lee   ⁵ , MA ;   Minjeong Jeon   ^{1, 2} , MA ;   Sangil Lee   ⁶ , PhD ;   Gangho Do   ⁷ , BS ;   Dooyoung Jung   ^{4, 6 *} , MD, PhD ;   Jin Young Park   ^{1, 2, 3 *} , MD, PhD

¹ Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea

² Department of Psychiatry, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Republic of Korea

³ Center for Digital Health, Yongin Severance Hospital, Yonsei University Health System, Yongin, Republic of Korea

⁴ Graduate School of Health Science and Technology, Ulsan National Institute of Science and Technology, Ulsan, Republic of Korea

⁵ Medical Research Team, Digital Medic Co., Ltd., Seoul, Republic of Korea

⁶ Department of Biomedical Engineering, Ulsan National Institute of Science and Technology, Ulsan, Republic of Korea

⁷ Digital Medic Co., Ltd., Seoul, Republic of Korea

*these authors contributed equally