A study on the prevalence of chronic bronchitis in workers exposed to smoke and irritant fumes in a railway workshop

Indian J Chest Dis Allied Sci. Jan-Mar 1992;34(1):25-8.


In the present study 108 full time workers employed in various sections of a railway workshop and exposed to smoke and irritant fumes, and 45 matched control subjects from local administrative staff were investigated to find prevalence of chronic bronchitis. In all 18 (16.7%) workers and 4 (8.9%) control subjects had clinical evidence of chronic bronchitis. Peak expiratory flow rate less than 300 L/min was observed in 54.6% workers and 2.2% control subjects. A significantly higher prevalence of chronic bronchitis was seen in workers. The advancing age, smoking and duration of exposure had significant influence on prevalence of chronic bronchitis.

Publication types

  • Comparative Study

MeSH terms

  • Adult
  • Air Pollutants, Occupational / adverse effects*
  • Bronchitis / epidemiology*
  • Bronchitis / etiology
  • Chronic Disease
  • Humans
  • India / epidemiology
  • Middle Aged
  • Occupational Diseases / epidemiology*
  • Occupational Diseases / etiology
  • Occupational Exposure*
  • Prevalence
  • Railroads*
  • Smoke / adverse effects
  • Smoking


  • Air Pollutants, Occupational
  • Smoke