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Measuring passive smoking: methods, problems, and perspectives.

L C Johnson, H W Letzel

    Preventive Medicine
    |November 1, 1984
    PubMed
    Summary
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    Existing definitions of passive smoking exclude many people and situations. A new, broader definition and a quantitative exposure concept (M-time) were developed to assess total population exposure to secondhand smoke.

    Area of Science:

    • Environmental Health
    • Public Health
    • Epidemiology

    Background:

    • Previous definitions of passive smoking have significant limitations.
    • These include applicability to narrow subpopulations, inability to account for lifestyle variations, and neglect of non-home exposure.
    • This necessitates a more inclusive approach to understanding secondhand smoke exposure.

    Purpose of the Study:

    • To develop a more comprehensive definition of passive smoking.
    • To introduce a quantitative method for assessing total population exposure to secondhand smoke.
    • To address the shortcomings of existing definitions and assessment tools.

    Main Methods:

    • A preliminary qualitative and classificatory definition of passive smoking was created.
    • A quantitative concept, Maximum Exposed M-time (TMI for individuals, TMG for groups), was developed.

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  • A representative survey and a cumulative standardized exposed M-time diagram were utilized.

    • Main Results:

    • The new definition identifies 17.8% of the population over 35 as potential passive smokers.
    • The quantitative concept aims to estimate exposure over time, overcoming limitations of previous questionnaires.
    • Initial results suggest plausibility and stability of the new concept and data.

    Conclusions:

    • A broader definition and a quantitative M-time concept are crucial for accurate passive smoking assessment.
    • These tools can encompass the total population and all exposure locations.
    • Further validation of the interview form is required.