Prevalence of poor sleep quality in college students of Iran: Systematic review and Meta analysis
Prevalence of poor sleep quality in college students of Iran: Systematic review and Meta analysis Mehdi Ranjbaran Department of Epidemiology and Reproductive Health, Reproductive Epidemiology Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran *Corresponding author) Mahboobeh Khorsandi, PhD, Associate Professor of Health Education, Department of Health Education and Health Promotion, School of Health, Arak University of Medical Sciences, Arak, Iran. dr.khorsandi@arakmu.ac.i r Abstract Background: Students sleep pattern, due to the stress of studying and teaching workload are different with other non student peers. The aim of this study was to determine the prevalence of poor sleep quality in college students of Iran by a meta analysis study, to be as a final measure for policy makers in this field. Methods: In this meta analysis study, the databases of PubMed, Science Direct, Scopus, Google Scholar and interior databases were searched up to November, 2014. Between the studies with regard to the inclusion and exclusion criteria, 15 studies were selected. Data analyzed by using Stata11 software. Publication bias was assessed by Begg and Egger tests. Also heterogeneity assessed by Cochran's Q statistic and I2 index. Couse of heterogeneity was evaluated by using meta regression. Results: Total samples in the 15 studies were 3260. Begg and Egger tests with the P value of 0.88 and 0.15 respectively, indicated the absence of publication bias. Cochran's Q statistic and I2 index revealed heterogeneity of the samples (Q=975.26, P value <0.001 and I2= 98.6) Overall prevalence of poor sleep quality in student based on the random effect was obtained 56.0% (95% CI: 43.2 68.7) Conclusion: Considering the high prevalence of sleep quality and its increase in previous years, detection of affecting factors, intervention and preventive actions, and education about the importance of sleep and time management skills in students seem essential. Keywords: sleep quality, students, meta analysis, Iran