Abstract
Purpose
This study aims to examine how working hours influence depressive symptoms and the association between working hours and depressive symptoms differently across genders.
Method
The sample consists of salaried workers aged 25–64 years who participated in two consecutive waves of the seven-wave Korean Welfare Panel Study (2007–2013) (n = 6813 individuals, 27,986 observations) which is a survey of a nationally representative sample of the South Korean population. I apply logit regression and fixed-effects logit regression to examine the causal relation between (intra-)individual changes of working hours and depressive symptoms over a 7-year period.
Results
Results from logit model and fixed-effects logit model show that less than 30 h of work per week and more than 60 h of work per week are associated with significantly higher levels of depressive symptoms. Sex-stratified analyses reveal that women who worked over 60 h per week were at increased risk of showing depressive symptoms compared with women who worked 30–40 h per week. No significant increase in depressive symptoms was seen in men who worked more than 60 h per week. However, men working less than 30 h per week are more likely to report higher levels of depressive symptoms.
Conclusions
These results suggest that work arrangement affects the mental health of men and women differently.
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Notes
Data for current study are publicly available and further details about the data can be found in its website (http://www.koweps.re.kr/).
Therefore, the first two waves are excluded because the second wave did not collect information on weekly working hours.
It is appropriate to distinguish between singlehood (i.e. never married) and other statuses such as divorced, widowed and separated. Stressful life events such as marital dissolution are likely to be linked to depressive symptoms.
References
Ai C, Norton EC (2003) Interaction terms in logit and probit models. Econ Lett 80:123–129
Allen H Jr, Slavin T, Bunn W 3rd (2007) Do long workhours impact health, safety, and productivity at a heavy manufacturer? J Occup Environ Med Am Coll Occup Environ Med 49:148–171
Amagasa T, Nakayama T (2012) Relationship between long working hours and depression in two working populations: a structural equation model approach. J Occup Environ Med 54:868–874
Amagasa T, Nakayama T (2013) Relationship between long working hours and depression: a 3-year longitudinal study of clerical workers. J Occup Environ Med 55:863–872
Andrea H, Bültmann U, van Amelsvoort LG, Kant Y (2009) The incidence of anxiety and depression among employees—the role of psychosocial work characteristics. Depression Anxiety 26:1040–1048
Artazcoz L et al (2009) Understanding the relationship of long working hours with health status and health-related behaviours. J Epidemiol Community Health (1979-) 63:521–527
Bell LA, Freeman RB (2001) The incentive for working hard: explaining hours worked differences in the US and Germany. Labour Econ 8:181–202
Bildt C, Michélsen H (2002) Gender differences in the effects from working conditions on mental health: a 4-year follow-up. Int Arch Occup Environ Health 75:252–258
Booth AL, Van Ours JC (2008) Job satisfaction and family happiness: the part-time work puzzle*. Econ J 118:F77–F99
Bültmann U (2012) Long working hours are associated with incident depressive and anxiety symptoms in women. Evid Based Ment Health 15:58
Cho MJ, Kim KH (1993) Diagnostic validity of the CES-D (Korean version) in the assessment of DSM-III-R major depression. J Korean Neuropsychiatr Assoc 32:381–399
Cho MJ, Kim KH (1998) Use of the center for epidemiologic studies depression (CES-D) scale in Korea. J Nerv Ment Dis 186:304–310
Courtemanche C (2009) Longer hours and larger waistlines? The relationship between work hours and obesity. Forum Health Econ Policy 12(2):1–31. doi:https://doi.org/10.2202/1558-9544.1123
Date Y et al (2009) Depressive symptoms in Chinese factory workers in Nagasaki. Jpn Ind Health 47:376–382
De Raeve L, Jansen NW, Kant I (2007) Health effects of transitions in work schedule, workhours and overtime in a prospective cohort study. Scand J Work Environ Health 33(2):105–113
Ferrer-i-Carbonell A (2005) Income and well-being: an empirical analysis of the comparison income effect. J Public Econ 89:997–1019
Geiger-brown J, Muntaner C, Lipscomb J, Trinkoff A (2004) Demanding work schedules and mental health in nursing assistants working in nursing homes. Work Stress 18:292–304. https://doi.org/10.1080/02678370412331320044
Greene W (2010) Testing hypotheses about interaction terms in nonlinear models. Econ Lett 107:291–296
Grosch JW, Caruso CC, Rosa RR, Sauter SL (2006) Long hours of work in the US: associations with demographic and organizational characteristics, psychosocial working conditions, and health. Am J Ind Med 49:943–952
Härkönen J (2007) Jobless couples in Europe: Comparative studies with longitudinal data. Doctoral dissertation. European University Institute
Korean Ministry of Health and Welfare (2014) Health Insurance Review and Assessment Service. Ministry of Health and Welfare, Sejong
Heo HT, Kim DW, Lee JS, Jo HA, Jang SS, Kim SY, Kim IA (2012) An association between working schedules and depression in public sector employees Korean. J Occup Environ Med 24:347–355
Hilbe JM (2011) Negative binomial regression. Cambridge University Press, Cambridge, England
Hobson J, Beach J (2000) An investigation of the relationship between psychological health and workload among managers. Occup Med 50:518–522
International Labour Office (1990) International standard classification of occupations: ISCO-88. International Labour office, Geneva
Karasek Jr RA (1979) Job demands, job decision latitude, and mental strain: implications for job redesign. Adm Sci Q 24(2):285–308
Kim I, Kim H, Lim S, Lee M, Bahk J, June KJ, Kim S, Chang WJ (2013) Working hours and depressive symptomatology among full-time employees: results from the fourth Korean National Health and Nutrition Examination Survey (2007–2009). Scand J Work Environ Health 39(5):515–520
Kim W, Park E-C, Lee T-H, Kim TH (2016) Effect of working hours and precarious employment on depressive symptoms in South Korean employees: a longitudinal study. Occup Environ Med. https://doi.org/10.1136/oemed-2016-103553
Kleiner S, Pavalko EK (2010) Clocking in: the organization of work time and health in the United States. Soc Forces 88:1463–1486
Kleppa E, Sanne B, Tell GS (2008) Working overtime is associated with anxiety and depression: the Hordaland Health Study. J Occup Environ Med 50:658–666
Kuehner C (2017) Why is depression more common among women than among men? Lancet Psychiatry 4:146–158
Kuroda S, Yamamoto I (2016) Workers’ mental health, long work hours, and workplace management: evidence from workers’ longitudinal data in japan. Technical report, Research Institute of Economy, Trade and Industry (RIETI)
Lee K-H et al (2013) Long working hours and emotional well-being in Korean manufacturing industry employees. Ann Occup Environ Med 25:38
Lombardi DA, Folkard S, Willetts JL, Smith GS (2010) Daily sleep, weekly working hours, and risk of work-related injury: US National Health Interview Survey (2004–2008). Chronobiol Int 27:1013–1030
Luecken LJ, Suarez EC, Kuhn CM, Barefoot JC, Blumenthal JA, Siegler IC, Williams RB (1997) Stress in employed women: impact of marital status and children at home on neurohormone output and home strain. Psychosom Med 59:352–359
Marchand A, Bilodeau J, Demers A, Beauregard N, Durand P, Haines VY (2016) Gendered depression: vulnerability or exposure to work and family stressors? Soc Sci Med 166:160–168
Michelsen H, Bildt C (2003) Psychosocial conditions on and off the job and psychological ill health: depressive symptoms, impaired psychological wellbeing, heavy consumption of alcohol. Occup Environ Med 60:489–496
Milner A, Smith P, LaMontagne A (2015) Working hours and mental health in Australia: evidence from an Australian population-based cohort, 2001–2012. Occup Environ Med. doi:10.1136/oemed-2014-102791
Murray CJ, Lopez AD (1997) Alternative projections of mortality and disability by cause 1990–2020: global Burden of Disease Study. Lancet 349:1498–1504
Nagashima S, Suwazono Y, Okubo Y, Uetani M, Kobayashi E, Kido T, Nogawa K (2007) Working hours and mental and physical fatigue in Japanese workers. Occup Med 57:449–452
Nakata A (2011) Work hours, sleep sufficiency, and prevalence of depression among full-time employees: a Community-Based Cross-Sectional Study [CME]. J Clin Psychiatry 72:605
OECD. Stat [website] Paris: organisation for economic co-operation and development, 2010. http://stats.oecd.org/Index.aspx?DatasetCode=CRSNEW. Accessed 7 May 2017
OECD (2015) Labour market statistics. Main economic indicators (database) https://doi.org/10.1787/data-00046-en
OECD (2016) OECD economic surveys: Korea 2016. OECD Publishing, Paris. https://doi.org/10.1787/eco_surveys-kor-2016-en
Otsuka Y, Sasaki T, Iwasaki K, Mori I (2009) Working hours, coping skills, and psychological health in Japanese daytime workers. Ind Health 47:22–32
Petrongolo B (2004) Gender segregation in employment contracts. J Eur Econ Assoc 2:331–345
Proctor SP, White RF, Robins TG, Echeverria D, Rocskay AZ (1996) Effect of overtime work on cognitive function in automotive workers. Scand J Work Environ Health 22(2):124–132
Radloff LS (1977) The CES-D scale a self-report depression scale for research in the general population. Appl Psychol Meas 1:385–401
Sanderson K, Andrews G (2006) Common mental disorders in the workforce: recent findings from descriptive and social epidemiology. Can J Psychiat 51:63
Shields M (1999) Long working hours and health. Health Rep Stat Can 11:33–48
Statistics Korea [website] http://www.index.go.kr/potal/main/EachDtlPageDetail.do?idx_cd=2478. Accessed 7 Sept 2017
Suwazono Y, Okubo Y, Kobayashi E, Kido T, Nogawa K (2003) A follow-up study on the association of working conditions and lifestyles with the development of (perceived) mental symptoms in workers of a telecommunication enterprise. Occup Med 53:436–442
Tarumi K, Hagihara A, Morimoto K (2003) A prospective observation of onsets of health defects associated with working hours. Ind Health 41:101–108
Tijdens K, Dragstra A (2007) ‘How many hours do you usually work?’ An analysis of the working hours questions in 26 large-scale surveys in six countries and the European Union. Time Soc 16(1):119–130
Tokuyama M, Nakao K, Seto M, Watanabe A, Takeda M (2003) Predictors of first-onset major depressive episodes among white-collar workers. Psychiatry Clin Neurosci 57:523–531
United Nations (2008) International Standard Industrial Classification of all Economic Activities (ISIC), Rev.4. New York: United Nations
Varma A, Marott JL, Stoltenberg CDG, Wieclaw J, Kolstad HA, Bonde JP (2012) With long hours of work, might depression then lurk? A nationwide prospective follow-up study among Danish senior medical consultants. Scand J Work Environ Health 38(5):418–426
Virtanen M, Ferrie JE, Singh-Manoux A, Shipley MJ, Stansfeld SA, Marmot MG, Ahola K, Vahtera J, Kivimäki M (2011) Long working hours and symptoms of anxiety and depression: a 5-year follow-up of the Whitehall II study. Psychol Med 41:2485–2494
Virtanen M, Heikkilä K, Jokela M, Ferrie JE, Batty GD, Vahtera J, Kivimäki M (2012) Long working hours and coronary heart disease: a systematic review and meta-analysis. Am J Epidemiol 176:586–596
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Ahn, S. Working hours and depressive symptoms over 7 years: evidence from a Korean panel study. Int Arch Occup Environ Health 91, 273–283 (2018). https://doi.org/10.1007/s00420-017-1278-z
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DOI: https://doi.org/10.1007/s00420-017-1278-z