Pneumoconiosis in Appalachian bituminous coal miners. Lainhart WS, Doyle HN, Enterline PE, Henschel A, Kendrick MA, eds. Cincinnati, OH: U.S. Department of Health, Education, and Welfare, Public Health Service, Consumer Protection and Environmental Health Service, Environmental Control Administration, Bureau of Occupational Safety and Health, 1969 Jan; :77-111
Ventilatory function and work capacity was studied in Appalachian bituminous working and nonworking coal miners, and separately in the West Virginia communities of Mullens and Richwood. The group from Mullens comprised coal miners, railroad workers, and their wives. The group from Richwood comprised coal miners, men of other occupations, and their wives. Ventilatory function was examined in the miners in relation to clinical findings, cigarette smoking, bronchitis, dyspnea, and roentgenographic categories. Forced vital capacity (FVC) and forced expiratory volume for 1, 2, and 3 seconds (FEV1, FEV2, FEV3) were calculated. For 2,193 men who had worked underground, ventilatory function, measured by FVC and FEV1, was progressively depressed with years of underground exposure compared to expected values from age changes. Of 2,405 working miners, the occurrence and severity of bronchitis was assessed from responses to questioning as "multiple" in 109, "simple" in 45, and "none" in the remainder. Of 2,422 miners, 83 had marked dyspnea, 1,199 moderate dyspnea, and 1,140 no dyspnea. In Richwood, no statistically significant differences were found between miners and nonminers for any of the ventilatory function parameters. In Mullens, the ventilatory function parameters approached those obtained in the pneumoconiosis prevalence survey more closely than did the Richwood survey. Pulse rate, maximum aerobic work capacity, oxygen consumption, and ventilation volumes were determined. Miners in Mullens had the highest predicted maximum aerobic work capacity of any group, including the Mullens nonminer group. Richwood miners had a lower capacity than either of the two Mullens groups but higher than Richwood nonminers. The wives in Mullens and Richwood did not differ in predicted maximum aerobic work capacity.