Publication Name	World Journal of Psychiatry
Manuscript ID	112817
Country	China

Category	Psychiatry
Manuscript Type	Observational Study
Article Title	Associations of excessive smartphone duration and unlock frequency with non-suicidal self-injury in college students
Manuscript Source	Unsolicited Manuscript
All Author List	Jian Yin, Guang-Dong Wang, Pei-Xi Wu, Hui Yang, Ze-Shi Liu and Yan-Ping Zhang
Funding Agency and Grant Number
Corresponding Author	Yan-Ping Zhang, Associate Chief Physician, Department of Laboratory, The Second Affiliated Hospital of Xi’an Jiaotong University, No. 157 West Wulu Road, Xincheng District, Xi’an 710004, Shaanxi Province, China. hongpijidan@mail.xjtu.edu.cn
Key Words	Excessive smartphone use; Non-suicidal self-injury; Smartphone duration; Smartphone unlock frequency; Objective measures; College students
Core Tip	The mental health impact of smartphone use remains incompletely understood. The present study assessed objective smartphone duration and unlock frequency by collecting participants’ smartphone use records screenshots, finding that excessive smartphone duration and unlock frequency were positively associated with non-suicidal self-injury among college students. Restricted cubic spline analyses found a monotonic increase in non-suicidal self-injury risk with increasing smartphone duration and unlock frequency, emphasizing the need to consider digital behavior patterns in developing prevention strategies.
Citation	Yin J, Wang GD, Wu PX, Yang H, Liu ZS, Zhang YP. Associations of excessive smartphone duration and unlock frequency with non-suicidal self-injury in college students. World J Psychiatry 2025; In press

Received	2025-08-20 04:25
Peer-Review Started	2025-08-20 04:25
To Make the First Decision
Return for Revision	2025-09-16 07:32
Revised	2025-09-30 17:18
Second Decision	2025-11-21 02:36
Accepted by Journal Editor-in-Chief
Accepted by Executive Editor-in-Chief	2025-11-21 07:51
Articles in Press	2025-11-21 07:51
Publication Fee Transferred	2025-10-02 14:13
Edit the Manuscript by Language Editor
Typeset the Manuscript

ISSN	2220-3206 (online)
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