Current employment status, occupational category, occupational hazard exposure and job stress in relation to telomere length: the Multiethnic Study of Atherosclerosis (MESA).
Level 4 - case-series / case-control
Cross-sectional observational study analyzing associations between occupational exposures and telomere length.
PubMed 23686115 · doi:10.1136/oemed-2012-101296
What was done
Leukocyte telomere length was measured via quantitative PCR in a community-based sample of 981 adults aged 45–84 years from the Multi-Ethnic Study of Atherosclerosis (MESA). Current employment status, main occupation prior to retirement, and job strain were collected via questionnaires and linked to the Occupational Information Network (O*NET) database to evaluate five exposure dimensions: physical activity on the job, physical hazard exposure, interpersonal stressors, job control, and job demands. Linear regression was used to assess associations with telomere length after controlling for age, sex, race, socioeconomic position, and behavioral risk factors.
What was found
The abstract reports no numerical values, effect sizes, confidence intervals, or p-values. It states there were no mean differences in telomere length across employment status, occupational categories, job strain categories, or most O*NET exposure measures. There was also no evidence that lower occupational status or adverse physical/psychosocial exposures altered the rate of age-related telomere shortening.
Why it matters
The findings suggest that leukocyte telomere shortening is unlikely to be a major biological pathway mediating the relationship between occupational stress or physical job hazards and adverse health outcomes.
Limits
The abstract provides no numerical data or precision estimates. The design is cross-sectional, occupational exposures relied partly on job-title database linkages rather than direct personal exposure measurements, and the study was restricted to an older population (ages 45–84).
Cited by
- supports Ordinary work stress is not associated with telomere shortening, whereas clinical burnout is.