Acknowledgement
We would like to express our gratitude to all the elderly apartment security workers who participated in this study.
References
- World Economic Forum. This chart shows South Korea's population is ageing and shrinking [Internet]. Geneva: World Economic Forum; 2021 [cited 2025 Jul 15]. Available from: https://www.weforum.org/agenda/2021/03/research-shows-increase-korea-ageing-population/
- Sewdas R, de Wind A, van der Zwaan LGL, van der Borg WE, Steenbeek R, van der Beek AJ, et al. Why older workers work beyond the retirement age: a qualitative study. BMC Public Health. 2017;17(1):672. https://doi.org/10.1186/s12889-017-4675-z
- Lee S, Lim J, Jang S, Oh Y. A study of the impact of work environment on depressive symptoms in older security guards. Korean Journal of Gerontological Social Welfare. 2023;78(3):167–194. https://doi.org/10.21194/kjgsw.78.3.202309.167
- Korea Occupational Safety and Health Agency. 2016 occupational health guideline: apartment security workers [Internet]. Ulsan: Occupational Safety and Health Research Institute; 2016 [cited 2025 Jul 30]. Available from: https://oshri.kosha.or.kr/kosha/data/business/occuHealthBusinessData.do?mode=view&articleNo=241330
- Seoul Labor Center. National survey report on apartment security workers [Internet]. Seoul: Seoul Labor Center; 2019 [cited 2025 Jul 15]. Available from: https://www.labors.or.kr/content/06data/01_01.php?proc_type=view&a_num=17150809&b_num=434
- Choi EH, Jung HS. The effects of violence experience and job stress on depression by long working hours of private security business. Journal of the Korean Society of Private Security. 2018;17(1):231–254.
- Shin DS, Choi ES. Health status, health behaviors & depression among the older-security workers. Journal of the Korean Data Analysis Society. 2010;12(4):1965–1977.
- Bazana S, Campbell K, Kabungaidze T. The impact of shift work on the health and wellbeing of campus security guards. New Voices in Psychology. 2016;12(2):70–93. https://doi.org/10.25159/1812-6371/2783
- Park S, Lee JH, Lee W. The effects of workplace rest breaks on health problems related to long working hours and shift work among male apartment janitors in Korea. Safety and Health at Work. 2019;10(4):512–517. https://doi.org/10.1016/j.shaw.2019.10.003
- Lee BR, Jung HS, Ryu HW, Lee SG. The effect of emotional labor and depression on the turnover intention of customer facility security guard. Korean Journal of Occupational Health. 2020;2(3):155–166. https://doi.org/10.35861/KJOH.2020.2.3.155
- Lee S, Lee J, Jeon S, Hwang Y, Kim J, Kim SJ. Sleep disturbances and depressive symptoms of shift workers: effects of shift schedules. Journal of Psychiatric Research. 2023;161:371–376. https://doi.org/10.1016/j.jpsychires.2022.12.048
- Grandey AA. Emotional regulation in the workplace: a new way to conceptualize emotional labor. Journal of Occupational Health Psychology. 2000;5(1):95–110. https://doi.org/10.1037/1076-8998.5.1.95
- Kim CG, Jeong S, Ryu YM, Park S, Moon K, Kwon Y, et al. Effects of fatigue and emotional labor on sleep quality among apartment security guards. Research in Community and Public Health Nursing. 2023;34(3):205–216. https://doi.org/10.12799/rcphn.2023.00220
- Jang SJ, Kang HT, Go SB, Kim IA, Kim HR, Oh SD, et al. Research on improving and utilizing stress assessment tools for emotional labor workers [Internet]. Ulsan: Korea Occupational Safety and Health Agency; 2018 [cited 2025 Jul 15]. Available from: https://kosha.or.kr/oshri/publication/researchReportSearch.do?mode=view&articleNo=408278&attachNo=
- Seoul Labor Center. Effects of emotional labor [Internet]. Seoul: Seoul Labor Portal [cited 2025 Jul 15]. Available from: https://www.seoullabor.or.kr/portal/cnts/selectContents.do?cntnts_id=A1000090
- Brown JP, Martin D, Nagaria Z, Verceles AC, Jobe SL, Wickwire EM. Mental health consequences of shift work: an updated review. Current Psychiatry Reports. 2020;22(2):7. https://doi.org/10.1007/s11920-020-1131-z
- Patnaik A, Dash A, Samal MR, Nanda S. Work environment, stress and burnout among security personnel during COVID-19 pandemic. Journal of Cardiovascular Disease Research. 2022;13(1):178–186. https://doi.org/10.31838/jcdr.2022.13.01.23
- Ministry of Health and Welfare. Announcement of the 2023 Survey of the elderly [Internet]. Sejong: Ministry of Health and Welfare; 2023 Oct 17 [cited 2025 Jul 15]. Available from: https://www.korea.kr/briefing/pressReleaseView.do?newsId=156655081
- World Health Organization. Mental health of older adults [Internet]. Geneva: WHO; 2023 [cited 2025 Jul 15]. Available from: https://www.who.int/news-room/fact-sheets/detail/mental-health-of-older-adults
- de Oliveira C, Saka M, Bone L, Jacobs R. The role of mental health on workplace productivity: a critical review of the literature. Applied Health Economics and Health Policy. 2023;21(2):167–193. https://doi.org/10.1007/s40258-022-00761-w
- Faul F, Erdfelder E, Buchner A, Lang AG. Statistical power analyses using G*Power 3.1: tests for correlation and regression analyses. Behavior Research Methods. 2009;41(4):1149–1160. https://doi.org/10.3758/BRM.41.4.1149
- Craig CL, Marshall AL, Sjöström M, Bauman AE, Booth ML, Ainsworth BE, et al. International physical activity question-naire: 12-country reliability and validity. Medicine & Science in Sports & Exercise. 2003;35(8):1381–1395. https://doi.org/10.1249/01.MSS.0000078924.61453.FB
- Sohn SI, Kim DH, Lee MY, Cho YW. The reliability and validity of the Korean version of the Pittsburgh Sleep Quality Index. Sleep and Breathing. 2012;16(3):803–812. https://doi.org/10.1007/s11325-011-0579-9
- Buysse DJ, Reynolds CF 3rd, Monk TH, Berman SR, Kupfer DJ. The Pittsburgh Sleep Quality Index: a new instrument for psychiatric practice and research. Psychiatry Research. 1989;28(2):193–213. https://doi.org/10.1016/0165-1781(89)90047-4
- Zhong QY, Gelaye B, Sánchez SE, Williams MA. Psychometric properties of the Pittsburgh Sleep Quality Index (PSQI) in a cohort of Peruvian pregnant women. Journal of Clinical Sleep Medicine. 2015;11(8):869–877. https://doi.org/10.5664/jcsm.4936
- Yesavage JA, Sheikh JI. 9/Geriatric Depression Scale (GDS). Clinical Gerontologist. 1986;5(1-2):165–173. https://doi.org/10.1300/J018v05n01_09
- Kee BS. A preliminary study for the standardization of Geriatric Depression Scale short form-Korea version. Journal of Korean Neuropsychiatric Association. 1996;35(2):298–307.
- Choi SJ, Song P, Suh S, Joo EY, Lee SI. Insomnia symptoms and mood disturbances in shift workers with different chronotypes and working schedules. Journal of Clinical Neurology. 2020;16(1):108–115. https://doi.org/10.3988/jcn.2020.16.1.108
- Srivastava S, Debnath P, Shri N, Muhammad T. The association of widowhood and living alone with depression among older adults in India. Scientific Reports. 2021;11(1):21641. https://doi.org/10.1038/s41598-021-01238-x
- Coyle CE, Dugan E. Social isolation, loneliness and health among older adults. Journal of Aging and Health. 2012;24(8):1346–1363. https://doi.org/10.1177/0898264312460275
- Colligan EM, Cross-Barnet C, Lloyd JT, McNeely J. Barriers and facilitators to depression screening in older adults: a qualitative study. Aging & Mental Health. 2020;24(2):341–348. https://doi.org/10.1080/13607863.2018.1531376
- Lee SH, Lee H, Yu S. Effectiveness of social support for community-dwelling elderly with depression: a systematic review and meta-analysis. Healthcare. 2022;10(9):1598. https://doi.org/10.3390/healthcare10091598
- Han S. Effects of work hours and night duty on sleep disturbance in Korean workers. Culture and Convergence. 2022;44(12):1277–1287. https://doi.org/10.33645/cnc.2022.12.44.12.1277
- Murphy MJ, Peterson MJ. Sleep disturbances in depression. Sleep Medicine Clinics. 2015;10(1):17–23. https://doi.org/10.1016/j.jsmc.2014.11.009
- Li Y, Wang Y, Lv X, Li R, Guan X, Li L, et al. Effects of factors related to shift work on depression and anxiety in nurses. Frontiers in Public Health. 2022;10:926988. https://doi.org/10.3389/fpubh.2022.926988
- Park H, Suh B, Lee SJ. Shift work and depressive symptoms: the mediating effect of vitamin D and sleep quality. Chronobiology International. 2019;36(5):689–697. https://doi.org/10.1080/07420528.2019.1585367
- Park S, Lee J, Lee JH. Synergistic interaction between long shifts and short rest periods on depression in shift workers: a cross-sectional study from Korea. American Journal of Industrial Medicine. 2023;66(11):977–983. https://doi.org/10.1002/ajim.23529
- du Prel JB, Koscec Bjelajac A, Franić Z, Henftling L, Brborović H, Schernhammer E, et al. The relationship between work-related stress and depression: a scoping review. Public Health Reviews. 2024;45:1606968. https://doi.org/10.3389/phrs.2024.1606968
- Kang D, Yang JW, Choi WJ, Ham S, Kang SK, Lee W. Anxiety, depression and sleep disturbance among customer-facing workers. Journal of Korean Medical Science. 2019;34(48):e313. https://doi.org/10.3346/jkms.2019.34.e313
- Caroli E, Godard M. Does job insecurity deteriorate health? Health Economics. 2016;25(2):131–147. https://doi.org/10.1002/hec.3122
- National Human Rights Commission of Korea. Survey on the human rights situation of elderly workers in monitoring and control positions [Internet]. Seoul: National Human Rights Commission of Korea; 2014 [cited 2025 Jul 15]. Available from: https://www.humanrights.go.kr/base/board/read?boardManagementNo=17&boardNo=609400&searchCategory=23&page=1&searchType=title&searchWord=%EB%85%B8%EC%9D%B8&menuLevel=3&menuNo=115
- Kind Mind Psychology. Reducing the risk of major depression when you live alone [Internet]. New York: Kind Mind Psychology; 2023 [cited 2025 Jul 15]. Available from: https://www.kindmindpsych.com/reducing-the-risk-of-major-depression-when-you-live-alone/