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Characterizing Short-Term Jobs in a Population-Based Study.

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Short-term jobs, lasting 1-2 years, often occur early in careers and involve hazardous exposures. Excluding them from occupational exposure assessments should have minimal impact due to their small contribution to total work years.

Keywords:
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Area of Science:

  • Occupational health and epidemiology
  • Environmental health
  • Public health

Background:

  • Detailed occupational exposure assessments for all jobs (≥1 year) can be resource-intensive.
  • Excluding short-term jobs (<2 years) may omit crucial exposure data relevant to disease etiology.
  • Characterizing short-term jobs is essential for comprehensive exposure assessment.

Purpose of the Study:

  • To characterize short-term jobs (1-2 years duration) within a population-based study in Montreal, Canada.
  • To compare characteristics of short-term jobs with those held for ≥2 years.

Main Methods:

  • Work histories of ~4000 prostate cancer case-control study participants (2005-2012) were collected.
  • 19,462 jobs (≥1 year) were analyzed, identifying 3655 short-term jobs.
  • Job characteristics were assessed using interviews and the Canadian Classification and Dictionary of Occupations.

Main Results:

  • Short-term jobs constituted <4% of average work years.
  • 45% of participants held at least one short-term job, often before age 24.
  • Short-term jobs more frequently involved exposure to fumes, odors, dust, poor ventilation, outdoor work, and heavy physical activity compared to longer jobs.

Conclusions:

  • Short-term jobs are common in early careers and present higher risks of hazardous exposures.
  • Despite increased exposures, their limited duration means excluding them has a minor impact on lifetime exposure assessments.
  • Accurate characterization of short-term jobs aids in refining occupational exposure assessment strategies.