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Depression Research and Treatment
Volume 2017, Article ID 7143547, 6 pages
Research Article

Investigation of the Relationship between Psychological Variables and Sleep Quality in Students of Medical Sciences

1Department of Medical Surgical Nursing, School of Nursing and Midwifery, Shiraz University of Medical Sciences, Shiraz, Iran
2Student Research Committee, Faculty of Nursing & Midwifery, Shiraz University of Medical Sciences, Shiraz, Iran
3Lamerd Nursing School, Shiraz University of Medical Sciences, Shiraz, Iran

Correspondence should be addressed to Majid Najafi Kalyani; moc.oohay@5ifajandijam

Received 16 June 2017; Revised 9 August 2017; Accepted 23 August 2017; Published 28 September 2017

Academic Editor: Axel Steiger

Copyright © 2017 Majid Najafi Kalyani et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objectives. Students of medical sciences are exposed to many emotional and mental problems. In light of the importance of sleep quality in learning and liveliness, this study was conducted to examine the relationship between psychological variables (stress, anxiety, and depression) and sleep quality of students. Design. This research is a cross-sectional analytical study, where all students studying at Fasa University of Medical Sciences in 2012-2013 year were selected. To examine the students’ stress, anxiety, and depression values, the standardized 21-item DASS-21 was used, and to examine their sleep quality, Pittsburgh Sleep Quality Index (PSQI) was used. Results. The results of the study demonstrated that 73% of the students have moderate and severe stress, and 46.4% of them have PSQ scores ≥ 5. The students’ mean sleep quality score was , and their stress score was . A statistically significant relationship was found between the students’ stress levels and sleep quality (). Conclusion. The high stress levels decrease students’ sleep quality. High stress levels and also the significant relationship between stress value and decrease in students’ sleep quality call for more attention to and care for students’ emotional and mental issues and timely proper interference on the part of authorities.