REFERENCES
1. Weston S, Frieman MB. COVID-19: Knowns, Unknowns, and Questions. MSphere. 2020;5(2):e00203-20.
2. de Wit E, van Doremalen N, Falzarano D, Munster VJ. SARS and MERS: recent insights into emerging coronaviruses. Nat Rev Microbiol. 2016;14(8):523‐534.
3. who.int/emergencies/diseases/novel-coronavirus-2019.
4. Cao W, Fang Z, Hou G, et al. The psychological impact of the COVID-19 epidemic on college students in China. Psychiatry Res. 2020;287:112934.
5. Ayittey FK, Ayittey MK, Chiwero NB, Kamasah JS, Dzuvor C. Economic impacts of Wuhan 2019-nCoV on China and the world. J Med Virol. 2020;92(5):473‐475.
6. Roy D, Tripathy S, Kar SK, Sharma N, Verma SK, Kaushal V. Study of knowledge, attitude, anxiety & perceived mental healthcare need in Indian population during COVID-19 pandemic [published online ahead of print, 2020 Apr 8]. Asian J Psychiatr. 2020;51:102083.
7. Moghanibashi-Mansourieh A. Assessing the anxiety level of Iranian general population during COVID-19 outbreak [published online ahead of print, 2020 Apr 18]. Asian J Psychiatr. 2020;51:102076.
8. Wang C, Pan R, Wan X, et al. Immediate Psychological Responses and Associated Factors during the Initial Stage of the 2019 Coronavirus Disease (COVID-19) Epidemic among the General Population in China. Int J Environ Res Public Health. 2020;17(5):1729.
9. Hao F, Tan W, Jiang L, et al. Do psychiatric patients experience more psychiatric symptoms during COVID-19 pandemic and lockdown? A case-control study with service and research implications for immunopsychiatry. Brain, behavior, and immunity. 2020;87:100–106.
10. Lovibond PF, Lovibond SH. The structure of negative emotional states: comparison of the Depression Anxiety Stress Scales (DASS) with the Beck Depression and Anxiety Inventories. Behav Res Ther. 1995;33(3):335‐343.
11. Sarıçam, H. The psychometric properties of Turkish version of Depression Anxiety Stress Scale-21 (DASS-21) in health control and clinical samples. Journal of Cognitive-Behavioral Psychotherapy and Research, 2018;7(1):19-30.
12. Creamer M, Bell R, Failla S. Psychometric properties of the Impact of Event Scale Revised. Behav Res Ther. 2003;41:1489-1496.
13. Çorapçıoğlu A, Yargıç İ, Geyran P, Kocabaşoğlu N. Olayların etkisi ölçeği. In IES-R) Türkçe versiyonunun geçerlilik ve güvenilirliği. Yeni Symposium. 2006;44:14-22.
14. Zhang Y, Ma ZF. Impact of the COVID-19 Pandemic on Mental Health and Quality of Life among Local Residents in Liaoning Province, China: A Cross-Sectional Study. Int J Environ Res Public Health. 2020;17(7):2381.
15. Tibshirani R. Regression shrinkage and selection via the lasso. Journal of the Royal Statistical Society: Series B (Methodological) 1996;58(1):267-288.
16. http://biostatapps.inonu.edu.tr/kruskalwallis/
17. www.psychiatry.org/newsroom/news-releases/new-poll-covid-19-impacting-mentalwell-being-americans-feeling-anxious-especially-for-loved-ones-older-adults-are-lessanxious. 2020. (Accessed 31 March 2020)
18. Liu N, Zhang F, Wei C, et al. Prevalence and predictors of PTSS during COVID-19 outbreak in China hardest-hit areas: Gender differences matter. Psychiatry Res. 2020;287:112921.
19. Olff, M. Sex and gender differences in post-traumatic stress disorder: an update. European journal of psychotraumatology. 2017;8(4):1351204.
20. Charak R, Armour C, Elklit A, Angmo D, Elhai JD, Koot HM. Factor structure of PTSD, and relation with gender in trauma survivors from India. European Journal of Psychotraumatology. 2014;5(1):25547.
21. Ahmed MZ, Ahmed O, Aibao Z, Hanbin S, Siyu L, Ahmad A. Epidemic of COVID-19 in China and associated Psychological Problems. Asian journal of psychiatry. 2020;51: 102092.
22. Leung GM, Lam TH, Ho LM, et al. The impact of community psychological responses on outbreak control for severe acute respiratory syndrome in Hong Kong [published correction appears in J Epidemiol Community Health. 2003 Dec;57(12):995]. J Epidemiol Community Health. 2003;57(11):857‐863.
23. Zhang WR, Wang K, Yin L, et al. Mental Health and Psychosocial Problems of Medical Health Workers during the COVID-19 Epidemic in China. Psychother Psychosom. 2020;89(4):242-250.
24. Zhai Y, Du X. Addressing collegiate mental health amid COVID-19 pandemic [published online ahead of print, 2020 Apr 17]. Psychiatry Res, 2020;288:113003.
25. Purgato M, Gastaldon C, Papola D, van Ommeren M, Barbui C, Tol WA. Psychological therapies for the treatment of mental disorders in low- and middle-income countries affected by humanitarian crises. Cochrane Database Syst Rev. 2018;7(7):CD011849.
26. Özdin S, Bayrak Özdin Ş. Levels and predictors of anxiety, depression and health anxiety during COVID-19 pandemic in Turkish society: The importance of gender [published online ahead of print, 2020 May 8]. Int J Soc Psychiatry. 2020;20764020927051.
27. Ho CSH, Tan ELY, Ho RCM, Chiu MYL. Relationship of Anxiety and Depression with Respiratory Symptoms: Comparison between Depressed and Non-Depressed Smokers in Singapore. Int J Environ Res Public Health. 2019;16(1):163.
28. Gao J, Zheng P, Jia, Y, et al. Mental health problems and social media exposureduring COVID-19 outbreak. PloS one. 2020;15(4):e0231924.
29. Lee AM, Wong JGWS, McAlonan GM, et al. Stress and psychological distress among Severe Acute Respiratory Syndrome (SARS) survivors 1 year after the outbreak. Can J Psychiatry. 2007;52:233–40.
30. Carleton RN. Into the unknown: A review and synthesis of contemporary models involving uncertainty. Journal of anxiety disorders. 2016;39:30–43.
31. Sim K, HuakChan Y, Chong PN, Chua HC, Wen Soon S. Psychosocial and coping responses within the community health care setting towards a national outbreak of an infectious disease. Journal of psychosomatic research. 2010;68(2):195–202.
32. Wang B, Li R, Lu Z, Huang Y. (2020). Does comorbidity increase the risk of patients with COVID-19: evidence from meta-analysis. Aging.  2020;12(7):6049–6057.