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Silicosis, chronic airflow limitation, and chronic bronchitis in South African gold miners.
Am Rev Respir Dis 1991; 143(1):80-4AR

Abstract

In a cross-sectional study of a working population of black South African gold miners, 1,197 men were studied with respiratory and occupational questionnaires, lung function tests, and chest radiographs. The study was designed to examine the effects of silicosis on respiratory symptoms and lung function. A total of 857 men with chronic, simple silicosis and 340 men without silicosis were included in the sample. Other determinants of lung disease including the duration and intensity of underground dust exposure and tobacco smoking were also examined. Three distinct pulmonary disorders could be discerned: silicosis-associated pulmonary dysfunction with dyspnea on effort; chronic airflow limitation, which was related to the duration of underground exposure; and a chronic bronchitic symptom complex, which reflected the intensity of dust exposure in the workplace. Chronic, uncomplicated silicosis was found to be associated with significant loss of lung function, and all of the measured indices, FVC, FEV1, FEV1/FVC%, maximal midexpiratory flow rate (MMEF), and lung diffusion for carbon monoxide measured by the single-breath method (DLCO) were reduced. When comparing men with Category 3/3 nodule profusion with men without silicosis, reductions of FVC of 351 ml, FEV1 of 447 ml, MMEF of 1.04 L/s, and DLCO of 4.7 ml/min/mm Hg (p = 0.0001) were detected after controlling for age, height, the direct effects of the underground environment, and tobacco smoking. Dyspnea on effort was more common in the men with silicosis (p less than 0.001).(

ABSTRACT

TRUNCATED AT 250 WORDS)

Authors+Show Affiliations

Department of Medicine, Ernest Oppenheimer Hospital, Welkom, South Africa.No affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

1986688

Citation

Cowie, R L., and S K. Mabena. "Silicosis, Chronic Airflow Limitation, and Chronic Bronchitis in South African Gold Miners." The American Review of Respiratory Disease, vol. 143, no. 1, 1991, pp. 80-4.
Cowie RL, Mabena SK. Silicosis, chronic airflow limitation, and chronic bronchitis in South African gold miners. Am Rev Respir Dis. 1991;143(1):80-4.
Cowie, R. L., & Mabena, S. K. (1991). Silicosis, chronic airflow limitation, and chronic bronchitis in South African gold miners. The American Review of Respiratory Disease, 143(1), pp. 80-4.
Cowie RL, Mabena SK. Silicosis, Chronic Airflow Limitation, and Chronic Bronchitis in South African Gold Miners. Am Rev Respir Dis. 1991;143(1):80-4. PubMed PMID: 1986688.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Silicosis, chronic airflow limitation, and chronic bronchitis in South African gold miners. AU - Cowie,R L, AU - Mabena,S K, PY - 1991/1/1/pubmed PY - 1991/1/1/medline PY - 1991/1/1/entrez SP - 80 EP - 4 JF - The American review of respiratory disease JO - Am. Rev. Respir. Dis. VL - 143 IS - 1 N2 - In a cross-sectional study of a working population of black South African gold miners, 1,197 men were studied with respiratory and occupational questionnaires, lung function tests, and chest radiographs. The study was designed to examine the effects of silicosis on respiratory symptoms and lung function. A total of 857 men with chronic, simple silicosis and 340 men without silicosis were included in the sample. Other determinants of lung disease including the duration and intensity of underground dust exposure and tobacco smoking were also examined. Three distinct pulmonary disorders could be discerned: silicosis-associated pulmonary dysfunction with dyspnea on effort; chronic airflow limitation, which was related to the duration of underground exposure; and a chronic bronchitic symptom complex, which reflected the intensity of dust exposure in the workplace. Chronic, uncomplicated silicosis was found to be associated with significant loss of lung function, and all of the measured indices, FVC, FEV1, FEV1/FVC%, maximal midexpiratory flow rate (MMEF), and lung diffusion for carbon monoxide measured by the single-breath method (DLCO) were reduced. When comparing men with Category 3/3 nodule profusion with men without silicosis, reductions of FVC of 351 ml, FEV1 of 447 ml, MMEF of 1.04 L/s, and DLCO of 4.7 ml/min/mm Hg (p = 0.0001) were detected after controlling for age, height, the direct effects of the underground environment, and tobacco smoking. Dyspnea on effort was more common in the men with silicosis (p less than 0.001).(ABSTRACT TRUNCATED AT 250 WORDS) SN - 0003-0805 UR - https://www.unboundmedicine.com/medline/citation/1986688/Silicosis_chronic_airflow_limitation_and_chronic_bronchitis_in_South_African_gold_miners_ L2 - http://www.atsjournals.org/doi/full/10.1164/ajrccm/143.1.80?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -