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Pulmonary function of London firemen.

D B Douglas, R B Douglas, D Oakes

    British Journal of Industrial Medicine
    |January 1, 1985
    PubMed
    Summary
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    This study found that cigarette smoking significantly harms lung function in firemen. Age over 40 also contributes to a faster decline in lung capacity, while employment duration showed minimal impact.

    Area of Science:

    • Occupational Health
    • Respiratory Medicine
    • Epidemiology

    Background:

    • Firemen are exposed to occupational hazards that may affect respiratory health.
    • Understanding lung function decline in specific occupations is crucial for public health.
    • Previous studies have indicated potential links between smoking and respiratory issues in various populations.

    Purpose of the Study:

    • To investigate the factors influencing lung function (FEV1 and FVC) in London firemen over a 12-month period.
    • To assess the impact of age, smoking, and duration of employment on respiratory health.
    • To analyze the prevalence of respiratory symptoms in relation to smoking habits.

    Main Methods:

    • A longitudinal study involving 1006 firemen in 1976 and 895 in 1977.

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  • Administration of the Medical Research Council respiratory questionnaire.
  • Measurement of forced expiratory volume in one second (FEV1) and forced vital capacity (FVC).
  • Multiple regression analysis to identify significant factors affecting lung function.

    • Main Results:

    • Average FEV1 and FVC levels were comparable to predicted values.
    • Accelerated decline in FEV1 and FVC was observed in firemen over 40 years old.
    • Cigarette smoking demonstrated a significant detrimental effect on lung function measures.
    • Respiratory symptoms were more prevalent in smokers and increased with smoking intensity.
    • No statistically significant effect of employment duration on lung function was found.

    Conclusions:

    • Cigarette smoking is a primary risk factor for reduced lung function among firemen.
    • Age is a significant factor in the rate of lung function decline.
    • Instrumental variation was identified as the main cause for the observed drop in lung function between 1976 and 1977.
    • Interventions targeting smoking cessation are essential for improving respiratory health in this occupational group.