Job strain in relation to body mass index: pooled analysis of 160 000 adults from 13 cohort studies

S T Nyberg, K Heikkilä, E I Fransson, L Alfredsson, D De Bacquer, J B Bjorner, S Bonenfant, M Borritz, H Burr, A Casini, E Clays, N Dragano, R Erbel, G A Geuskens, M Goldberg, W E Hooftman, I L Houtman, K-H Jöckel, F Kittel, A KnutssonM Koskenvuo, C Leineweber, T Lunau, I E H Madsen, L L Magnusson Hanson, M G Marmot, M L Nielsen, M Nordin, T Oksanen, J Pentti, R Rugulies, J Siegrist, S Suominen, J Vahtera, M Virtanen, P Westerholm, H Westerlund, M Zins, J E Ferrie, T Theorell, A Steptoe, M Hamer, A Singh-Manoux, G D Batty, M Kivimäki, IPD-Work Consortium

108 Citations (Scopus)

Abstract

Background. Evidence of an association between job strain and obesity is inconsistent, mostly limited to small-scale studies, and does not distinguish between categories of underweight or obesity subclasses. Objectives. To examine the association between job strain and body mass index (BMI) in a large adult population. Methods. We performed a pooled cross-sectional analysis based on individual-level data from 13 European studies resulting in a total of 161746 participants (49% men, mean age, 43.7years). Longitudinal analysis with a median follow-up of 4years was possible for four cohort studies (n=42222). Results. A total of 86429 participants were of normal weight (BMI 18.5-24.9kgm -2), 2149 were underweight (BMI<18.5kgm -2), 56572 overweight (BMI 25.0-29.9kgm -2) and 13523 class I (BMI 30-34.9kgm -2) and 3073 classes II/III (BMI≥ 35kgm -2) obese. In addition, 27010 (17%) participants reported job strain. In cross-sectional analyses, we found increased odds of job strain amongst underweight [odds ratio 1.12, 95% confidence interval (CI) 1.00-1.25], obese class I (odds ratio 1.07, 95% CI 1.02-1.12) and obese classes II/III participants (odds ratio 1.14, 95% CI 1.01-1.28) as compared with participants of normal weight. In longitudinal analysis, both weight gain and weight loss were related to the onset of job strain during follow-up. Conclusions. In an analysis of European data, we found both weight gain and weight loss to be associated with the onset of job strain, consistent with a 'U'-shaped cross-sectional association between job strain and BMI. These associations were relatively modest; therefore, it is unlikely that intervention to reduce job strain would be effective in combating obesity at a population level.

Original languageEnglish
JournalJournal of Internal Medicine
Volume272
Issue number1
Pages (from-to)65-73
Number of pages9
ISSN0954-6820
DOIs
Publication statusPublished - Jul 2012

Keywords

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Body Mass Index
  • Cohort Studies
  • Cross-Sectional Studies
  • Employment
  • Europe
  • Female
  • Humans
  • Male
  • Middle Aged
  • Obesity
  • Odds Ratio
  • Overweight
  • Stress, Psychological
  • Weight Gain

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