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  • Title: Spirometric indices of early airflow obstruction.
    Author: Joseph CM, Sridhar CB, Raphael M.
    Journal: J Indian Med Assoc; 1991 May; 89(5):135-7. PubMed ID: 1748780.
    Abstract:
    Thirty cigarette smokers and 25 non-smoking controls, all men were evaluated by history, physical examination and simple spirometry. The history and physical examination were not of much use in predicting airflow obstruction. Forced mid-expiratory flow (FEF 25-75%) was abnormally low in 23 of the 30 subjects, while forced expiratory volume in 1 second (FEV1) and FEV1/FVC (forced vital capacity) were less sensitive. Thus simple spirometry is a useful screening tool to detect early airflow obstruction even when it is clinically undetectable.
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