Associations of Internet Addiction Severity With Psychopathology, Serious Mental Illness, and Suicidality: Large-Sample Cross-Sectional Study

Wanjun Guo   ^{1 *} , MD, PhD ;   Yujie Tao   ^{1 *} , MSc ;   Xiaojing Li   ¹ , PhD ;   Xia Lin   ^{2, 3} , MSc ;   Yajing Meng   ¹ , PhD ;   Xia Yang   ¹ , BSc ;   Huiyao Wang   ¹ , MSc ;   Yamin Zhang   ¹ , PhD ;   Wanjie Tang   ⁴ , PhD ;   Qiang Wang   ¹ , MD, PhD ;   Wei Deng   ¹ , MD, PhD ;   Liansheng Zhao   ¹ , BSc ;   Xiaohong Ma   ¹ , MD, PhD ;   Mingli Li   ¹ , PhD ;   Ting Chen   ¹ , MSc ;   Jiajun Xu   ¹ , PhD ;   Jing Li   ¹ , MD, PhD ;   Wei Hao   ⁵ , PhD ;   Sing Lee   ⁶ , FRCS ;   Jeremy W Coid   ¹ , PhD ;   Andrew J Greenshaw   ⁷ , PhD, FRSA ;   Tao Li   ¹ , MD, PhD

¹ Mental Health Center and Psychiatric Laboratory, State Key Laboratory of Biotherapy, West China Hospital of Sichuan University, Chengdu, Sichuan, China

² Institute of Emergency Management and Post-Disaster Reconstruction, Sichuan University, Chengdu, China

³ North Sichuan Medical College (NSMC), Affiliated Hospital of North Sichuan Medical College, Nanchong City, China

⁴ Centre for Educational and Health Psychology, Sichuan University, Chengdu, China

⁵ Mental Health Institute, The Second Xiangya Hospital, Central South University, Hunan, Changsha, China

⁶ Department of Psychiatry, The Chinese University of Hong Kong, Hong Kong, China (Hong Kong)

⁷ Department of Psychiatry, University of Alberta, Edmonton, AB, Canada

*these authors contributed equally