Acknowledgement
This research was supported by a grant from the Korea Health Technology R&D Project through the Korea Health Industry Development Institute (KHIDI), funded by the Ministry of Health & Welfare (No. HF20C0104).
References
- Barnes CM, Watson NF. Why healthy sleep is good for business. Sleep Med Rev. 2019;47:112-8.
- Ishibashi Y, Shimura A. Association between work productivity and sleep health: a cross-sectional study in Japan. Sleep Health. 2020;6(3):270-6.
- Jeon BM, Kim SH. Associations of extended work, higher workloads and emotional work demands with sleep disturbance among night-shift workers. BMC Public Health. 2022;22(1):2138.
- Tan X, Lebedeva A, Akerstedt T, Wang HX. Sleep mediates the association between stress at work and incident dementia: study from the survey of health, ageing and retirement in Europe. J Gerontol A Biol Sci Med Sci. 2023;78(3):447-53.
- Robbins R, Jackson CL, Underwood P, Vieira D, Jean-Louis G, Buxton OM. Employee sleep and workplace health promotion: a systematic review. Am J Health Promot. 2019;33(7):1009-19.
- Conway-Jones R, Dunlop E, Kyle S, Ray D, Roberts N, Farmer A. A scoping review of the evidence for the impact of pharmacological and non-pharmacological interventions on shift work related sleep disturbance in an occupational setting. Wellcome Open Res. 2023;6:198.
- Occupational Safety and Health Research Institute (OSHRI). Results of the 6th Korean working conditions survey (2020-2021). Ulsan, Republic of Korea: OSHRI; 2021.
- OECD. Hours worked (indicator) [Internet]. OECD; 2023 [cited 2024 Feb 19]. Available from: https://data.oecd.org/emp/hoursworked.htm
- Visvalingam N, Sathish T, Soljak M, Chua AP, Dunleavy G, Divakar U, et al. Prevalence of and factors associated with poor sleep quality and short sleep in a working population in Singapore. Sleep Health. 2020;6(3):277-87.
- Khubchandani J, Price JH. Short sleep duration in working American adults, 2010-2018. J Community Health. 2020;45(2):219-27.
- Harding EC, Franks NP, Wisden W. The temperature dependence of sleep. Front Neurosci. 2019;13:336.
- Mun S, Park K, Bae KH, Baek Y, Lee S. Association of cold/heat sensation with sleep quality and insomnia in middle-aged women. J Korean Med. 2024;45(1):125-36.
- Yamazaki F, Nonaka Y. Pre-sleep warming of legs enhances thermal comfort and sleep quality in young adults with a cold constitution. Japanese J Med Nurs Educ. 2023;31(3):1-9.
- Bae KH, Jang ES, Park K, Lee Y. Development on the questionnaire of cold-heat pattern identification based on usual symptoms - reliability and validation study -. J Physiol Pathol Korean Med. 2018;32(5):341-6.
- Jo J, Lee HL, Lee SH, Baek Y, Lee Y, Kim H. Exploratory analysis of cold, heat, deficiency, or excess pattern distribution in women with dysmenorrhea. Explore (NY). 2020;16(3):185-8.
- Hyun MK, Yoshino T. Association between cold-heat symptoms and sleep disturbances according to the Sasang constitution: a cross-sectional community study. J Soc Prev Korean Med. 2022;26(1):59-74.
- Son MJ, Lee DH. Effectiveness of herbal ointment Biyeom-go according to cold-heat pattern identification: a subgroup analysis on patients with rhinitis. J Korean Med Ophthalmol Otolaryngol Dermatol. 2019;32(4):29-40.
- 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 Res. 1989;28(2):193-213.
- Sohn SI, Kim DH, Lee MY, Cho YW. The reliability and validity of the Korean version of the Pittsburgh Sleep Quality Index. Sleep Breath. 2012;16(3):803-12.
- International Labour Organization (ILO). Work and employment are not synonyms [Internet]. Switzerland: ILO; 2019 Oct 29 [cited 2024 Feb 19]. Available from: https://ilostat.ilo.org/work-and-employment-are-not-synonyms/
- Khosravipour M, Khanlari P, Khazaie S, Khosravipour H, Khazaie H. A systematic review and meta-analysis of the association between shift work and metabolic syndrome: the roles of sleep, gender, and type of shift work. Sleep Med Rev. 2021;57:101427.
- Ministry of Manpower (MOM). Employment practices [Internet]. Singapore: MOM; 2023 [updated 2023 Jul 4; cited 2024 Feb 19]. Available from: https://www.mom.gov.sg/employmentpractices
- Pilcher JJ, Morris DM. Sleep and organizational behavior: implications for workplace productivity and safety. Front Psychol. 2020;11:45.
- Yamauchi T, Sasaki T, Takahashi K, Umezaki S, Takahashi M, Yoshikawa T, et al. Long working hours, sleep-related problems, and near-misses/injuries in industrial settings using a nationally representative sample of workers in Japan. PLoS One. 2019;14(7):e0219657.
- Angehrn A, Teale Sapach MJN, Ricciardelli R, MacPhee RS, Anderson GS, Carleton RN. Sleep quality and mental disorder symptoms among Canadian public safety personnel. Int J Environ Res Public Health. 2020;17(8):2708.
- Shiri R, Karhula K, Turunen J, Koskinen A, Ropponen A, Ervasti J, et al. The effect of using participatory working time scheduling software on employee well-being and workability: a cohort study analysed as a pseudo-experiment. Healthcare (Basel). 2021;9(10):1385.
- Rivera AS, Akanbi M, O'Dwyer LC, McHugh M. Shift work and long work hours and their association with chronic health conditions: a systematic review of systematic reviews with meta-analyses. PLoS One. 2020;15(4):e0231037.
- Bergman LE, Bernhard-Oettel C, Bujacz A, Leineweber C, Toivanen S. Comparing depressive symptoms, emotional exhaustion, and sleep disturbances in self-employed and employed workers: application of approximate bayesian measurement invariance. Front Psychol. 2021;11:598303.
- Kim HJ, Min JY, Min KB. Physical and mental health problems of self-employed small business owners in South Korea. Am J Ind Med. 2019;62(9):783-90.
- Porkka-Heiskanen T, Zitting KM, Wigren HK. Sleep, its regulation and possible mechanisms of sleep disturbances. Acta Physiol (Oxf). 2013;208(4):311-28.
- Keramidas ME, Botonis PG. Short-term sleep deprivation and human thermoregulatory function during thermal challenges. Exp Physiol. 2021;106(5):1139-48.
- Paksarian D, Rudolph KE, Stapp EK, Dunster GP, He J, Mennitt D, et al. Association of outdoor artificial light at night with mental disorders and sleep patterns among US adolescents. JAMA Psychiatry. 2020;77(12):1266-75.
- Aulsebrook AE, Jones TM, Mulder RA, Lesku JA. Impacts of artificial light at night on sleep: a review and prospectus. J Exp Zool A Ecol Integr Physiol. 2018;329(8-9):409-18.
- Esaki Y, Kitajima T, Obayashi K, Saeki K, Fujita K, Iwata N. Light exposure at night and sleep quality in bipolar disorder: the APPLE cohort study. J Affect Disord. 2019;257:314-20.
- Doi Y, Minowa M, Tango T. Impact and correlates of poor sleep quality in Japanese white-collar employees. Sleep. 2003;26(4):467-71.
- Li W, Ruan W, Peng Y, Lu Z, Wang D. Associations of socioeconomic status and sleep disorder with depression among US adults. J Affect Disord. 2021;295:21-7.
- Etindele Sosso FA, Kreidlmayer M, Pearson D, Bendaoud I. Towards a socioeconomic model of sleep health among the Canadian population: a systematic review of the relationship between age, income, employment, education, social class, socioeconomic status and sleep disparities. Eur J Investig Health Psychol Educ. 2022;12(8):1143-67.
- Mao Y, Raju G, Zabidi MA. Association between occupational stress and sleep quality: a systematic review. Nat Sci Sleep. 2023;15:931-47.
- Linton SJ, Kecklund G, Franklin KA, Leissner LC, Sivertsen B, Lindberg E, et al. The effect of the work environment on future sleep disturbances: a systematic review. Sleep Med Rev. 2015;23:10-9.
- Yamazaki F, Inoue K, Ohmi N, Okimoto C. A two-week exercise intervention improves cold symptoms and sleep condition in cold-sensitive women. J Physiol Anthropol. 2023;42(1):22.