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- W2336202010 abstract "In 1962 to 1963 a survey was carried out in the town of Carletonville on a sample of the male population to determine whether chronic bronchitis is more prevalent in miners and exminers than in nonminers. Males over 35 years of age living in every third house in the town were interviewed. As there is evidence that there may be differences in lung function between wh1tes and nonwhites this study was carried out entirely on white subjects. As part of the procedure each subject performed two simple physiologic tests of ventilatory function: the forced expiratory volume in one second (FEV,) and the peak expiratory flow rate (PEFR). In a previous publication Sluis-Cremer, and associates (1) showed that no significant differences in ventilatory function as measured by these two techniques could be shown to exist between miners and nonminers provided they did not suffer from chronic bronchitis. No objection could, therefore, be seen to pooling the mining and nonmining groups for study to establish norms of ventilatory function at an altitude of 5,000 feet (1,524 meters). No clinical examination was carried out as part of the survey, and the men under study were defined as normal only insofar as they did not suffer from chronic bronchitis. A group of 20 miners with silicosis but no chronic bronchitis were also eliminated from the sample. Chronic bronchitis is herein defined as cough and production of sputum present for as much as three months each year. The facts in this connection were established by a standardized questionnaire on respiratory symptoms (Long questionnaire approved by the Committee on Etiology of Bronchitis of Medical Research Council, Great Britain 1961)." @default.
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- W2336202010 date "1968-08-01" @default.
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- W2336202010 title "Ventilatory function in males in a Witwatersrand town. Comparison between smokers and nonsmokers." @default.
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- W2336202010 doi "https://doi.org/10.1164/arrd.1968.98.2.229" @default.
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