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Impact of sleep quality on the risk of suicide among medical students: mediating effect of depression and moderating effect of academic stress
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Jiao LIU1, Ming-jun RUAN1, Yan-ming MO2, Yun-huan ZHAO2, Li-juan JI2, Song-ting CHEN3, Yu-qi CHENG4
Modern Preventive Medicine | 2024, 51(24) : 4529 - 4535
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Modern Preventive Medicine | 2024, 51(24): 4529-4535
Impact of sleep quality on the risk of suicide among medical students: mediating effect of depression and moderating effect of academic stress
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Jiao LIU1, Ming-jun RUAN1, Yan-ming MO2, Yun-huan ZHAO2, Li-juan JI2, Song-ting CHEN3, Yu-qi CHENG4
Affiliations
  • Department of Psychiatry, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, China
Published: 2024-12-25 doi: 10.20043/j.cnki.MPM.202407163
Outline
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Objective

To investigate the effect of sleep quality on suicide risk among medical students and the role of depression and academic stress in the relationship.

Methods

A questionnaire survey of 3 521 current medical students was conducted using the Pittsburgh Sleepiness Scale, the Patient Health Questionnaire Depression Scale, the Beck Suicidal Ideation Scale, and the Academic Stress Score. SPSS 26.0 was applied for descriptive statistics, independent samples t-test, ANOVA and correlation analysis of the data, and PROCESS plug-in was used for the moderated mediation test.

Results

Sleep quality index positively predicted suicide risk（β=0.315）; depression partially mediated the association between sleep quality and suicide risk (β=0.233, 95% CI: 0.174-0.297), with a mediating effect accounting for 74.19% of the total effect; academic stress moderated the first half path of the mediation model (β=0.093), i.e., moderated the effect of sleep quality on depression.

Conclusion

Sleep quality increases the risk of suicide among medical students by affecting depression; reducing academic stress reduces the effect of sleep quality on depression among medical students.

Sleep quality  /  Academic stress  /  Depression  /  Suicide risk  /  Medical students
Jiao LIU, Ming-jun RUAN, Yan-ming MO, Yun-huan ZHAO, Li-juan JI, Song-ting CHEN, Yu-qi CHENG. Impact of sleep quality on the risk of suicide among medical students: mediating effect of depression and moderating effect of academic stress[J]. Modern Preventive Medicine, 2024 , 51 (24) : 4529 -4535 . DOI: 10.20043/j.cnki.MPM.202407163
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Article Info
doi: 10.20043/j.cnki.MPM.202407163
  • Receive Date：2024-07-10
  • Online Date：2026-03-18
  • Published：2024-12-25
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  • Received：2024-07-10
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    Department of Psychiatry, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650032, China
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