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Job strain as a risk factor for clinical depression: systematic review and meta-analysis with additional individual participant data

  • I E H Madsen
  • , S T Nyberg
  • , L L Magnusson Hanson
  • , J E Ferrie
  • , K Ahola
  • , L Alfredsson
  • , G D Batty
  • , J B Bjorner
  • , M Borritz
  • , H Burr
  • , J-F Chastang
  • , R de Graaf
  • , N Dragano
  • , M Hamer
  • , M Jokela
  • , A Knutsson
  • , M Koskenvuo
  • , A Koskinen
  • , C Leineweber
  • , I Niedhammer
  • M L Nielsen, M Nordin, T Oksanen, J H Pejtersen, J Pentti, I Plaisier, P Salo, A Singh-Manoux, S Suominen, M Ten Have, T Theorell, S Toppinen-Tanner, J Vahtera, A Väänänen, P J M Westerholm, H Westerlund, E I Fransson, K Heikkilä, M Virtanen, R Rugulies, M Kivimäki, IPD-Work Consortium
  • Finnish Institute of Occupational Health, Helsinki, Finland.
  • Stress Research Institute, Stockholm University, Stockholm, Sweden.
  • Department of Epidemiology and Public Health,University College London, UK.
  • Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden.
  • Department of Occupational and Environmental Medicine, Bispebjerg University Hospital, Copenhagen, Denmark.
  • Federal Institute for Occupational Safety and Health (BAuA), Berlin, Germany.
  • INSERM, U1085, Research Institute for Environmental and Occupational Health (IRSET), Epidemiology in Occupational Health and Ergonomics (ESTER) Team, Angers, France.
  • Netherlands Institute of Mental Health and Addiction, Utrecht, The Netherlands.
  • Department of Medical Sociology,University of Düsseldorf,40225 Düsseldorf,Germany.
  • Institute of Behavioral Sciences, University of Helsinki, Helsinki, Finland.
  • Department of Health Sciences, Mid Sweden University, Sundsvall, Sweden.
  • Department of Public Health, University of Helsinki, Helsinki, Finland.
  • Unit of Social Medicine, Frederiksberg University Hospital, Copenhagen, Denmark.
  • The Danish National Centre for Social Research, Copenhagen,Denmark.
  • The Netherlands Institute for Social Research,2515 XP The Hague,The Netherlands.
  • Folkhälsan Research Center,FI-00290 Helsinki,Finland.
  • Occupational and Environmental Medicine,Uppsala University,SE-751 85 Uppsala,Sweden.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstract

BACKGROUND: Adverse psychosocial working environments characterized by job strain (the combination of high demands and low control at work) are associated with an increased risk of depressive symptoms among employees, but evidence on clinically diagnosed depression is scarce. We examined job strain as a risk factor for clinical depression.

METHOD: We identified published cohort studies from a systematic literature search in PubMed and PsycNET and obtained 14 cohort studies with unpublished individual-level data from the Individual-Participant-Data Meta-analysis in Working Populations (IPD-Work) Consortium. Summary estimates of the association were obtained using random-effects models. Individual-level data analyses were based on a pre-published study protocol.

RESULTS: We included six published studies with a total of 27 461 individuals and 914 incident cases of clinical depression. From unpublished datasets we included 120 221 individuals and 982 first episodes of hospital-treated clinical depression. Job strain was associated with an increased risk of clinical depression in both published [relative risk (RR) = 1.77, 95% confidence interval (CI) 1.47-2.13] and unpublished datasets (RR = 1.27, 95% CI 1.04-1.55). Further individual participant analyses showed a similar association across sociodemographic subgroups and after excluding individuals with baseline somatic disease. The association was unchanged when excluding individuals with baseline depressive symptoms (RR = 1.25, 95% CI 0.94-1.65), but attenuated on adjustment for a continuous depressive symptoms score (RR = 1.03, 95% CI 0.81-1.32).

CONCLUSIONS: Job strain may precipitate clinical depression among employees. Future intervention studies should test whether job strain is a modifiable risk factor for depression.

OriginalsprogEngelsk
TidsskriftPsychological Medicine
Vol/bind47
Udgave nummer8
Sider (fra-til)1342-1356
Antal sider15
ISSN0033-2917
DOI
StatusUdgivet - 2017

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