Lung function and functional exercise capacity in underground semi-precious stone mineworkers.

Autor:	Souza, Tamires Patrícia, Souza, Rafaela, Watte, Guilherme, de Souza, Jorge Alan, Moreira, José da Silva, Knorst, Marli Maria
Předmět:	LUNG physiology AGE distribution BODY weight CHEST X rays CHI-squared test CONFIDENCE intervals STATISTICAL correlation INTERVIEWING DUST diseases MARITAL status MEDICAL records MINERAL industries MULTIVARIATE analysis QUESTIONNAIRES RACE PULMONARY function tests SMOKING SPIROMETRY STATISTICS STATURE T-test (Statistics) OCCUPATIONAL hazards DATA analysis ENVIRONMENTAL exposure EDUCATIONAL attainment BODY mass index CROSS-sectional method DATA analysis software FUNCTIONAL assessment DESCRIPTIVE statistics EXERCISE tolerance ACQUISITION of data methodology MANN Whitney U Test FORCED expiratory volume
Zdroj:	Work; 2020, Vol. 66 Issue 1, p193-200, 8p, 4 Charts, 1 Graph
Abstrakt:	BACKGROUND: Semi-precious stone mining may cause occupational lung disease. The impact of inhaling silica on workers' exercise capacity has only been partially studied. OBJECTIVES: To study lung function, exercise capacity, and identify factors associated with functional impairment. METHODS: In a cross-sectional study of 193 current miners from Ametista do Sul, Rio Grande do Sul, Brazil, medical and occupational data were collected. The diagnosis of silicosis was established by the history of dust exposure and chest radiographic findings. All workers performed a spirometry and a 6-minute walk test (6MWT). RESULTS: Of the sample 51 (26.4%) had silicosis. Time working in mine was 14.7±8.7 years. Spirometry showed a normal, restrictive or obstructive ventilatory pattern in 75.1 %, 13 % and 9.3 % of the workers, respectively. The diagnosis of silicosis and length of time working in mining negatively affected lung function, although exercise capacity was preserved. In the multivariate analysis, time working in mining, diagnosis of silicosis and education remained significant for forced expiratory volume in one second (FEV1; r = 0.60; r2 = 0.36; p < 0.001) and age and height for distance in 6MWT (r = 0.66; r2 = 0.43; p < 0.001). CONCLUSIONS: Our results show impaired lung function and preserved exercise capacity in current mineworkers exposed to silica. Length of time working in mining, presence of silicosis and lower education were factors associated with reduced lung function. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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