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High prevalence of respiratory symptoms among workers in the development section of a manually operated coal mine in a developing country: a cross sectional study.

Abstract

BACKGROUND

Few studies of miners have been carried out in African countries; most are from South Africa, where the working conditions are assumed to be better than in the rest of Africa. Several studies have focused on respiratory disorders among miners, but development workers responsible for creating underground road ways have not been studied explicitly. This is the first study assessing the associations between exposure to dust and quartz and respiratory symptoms among coal mine workers in a manually operated coal mine in Tanzania, focusing on development workers, as they have the highest exposure to coal dust.

METHODS

A cross-sectional study was carried out among 250 production workers from a coal mine. Interviews were performed using modified standardized questionnaires to elicit information on occupational history, demographics, smoking habits and acute and chronic respiratory symptoms. The relationships between current dust exposure as well as cumulative respirable dust and quartz and symptoms were studied by group comparisons as well as logistic regression.

RESULTS

Workers from the development group had the highest dust exposure, with arithmetic mean of 10.3 mg/m3 for current respirable dust and 1.268 mg/m3 for quartz. Analogous exposure results for mine workers were 0.66 mg/m3 and 0.03 mg/m3, respectively; and for other development workers were 0.88 mg/m3 and 0.10 mg/m3, respectively. The workers from the development section had significantly higher prevalence of the acute symptoms of dry cough (45.7%), breathlessness (34.8%) and blocked nose (23.9%). In addition, development workers had significantly more chronic symptoms of breathlessness (17.0%) than the mine workers (6.4%) and the other production workers (2.4%). The highest decile of cumulative exposure to respirable dust was significantly associated with cough (OR = 2.91, 95% CI 1.06, 7.97) as were cumulative exposure to quartz and cough (OR = 2.87, CI 1.05, 7.88), compared with the reference consisting of the group of workers with the lowest quartile of the respective cumulative exposure.

CONCLUSION

The development workers in a coal mine had more acute and chronic respiratory symptoms than the mine and the other production workers. In addition, there was an association between high cumulative coal dust and respiratory symptoms.

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  • Authors+Show Affiliations

    ,

    Centre for International Health, University of Bergen, Norway. mamuyasimon@yahoo.com

    , ,

    Source

    BMC public health 7: 2007 Feb 01 pg 17

    MeSH

    Adult
    Coal Mining
    Cough
    Dust
    Humans
    Male
    Middle Aged
    Nasal Obstruction
    Occupational Diseases
    Occupational Exposure
    Prevalence
    Quartz
    Respiration Disorders
    Respiratory Insufficiency
    Rhinitis
    Tanzania

    Pub Type(s)

    Journal Article
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    17270039

    Citation

    Mamuya, Simon H D., et al. "High Prevalence of Respiratory Symptoms Among Workers in the Development Section of a Manually Operated Coal Mine in a Developing Country: a Cross Sectional Study." BMC Public Health, vol. 7, 2007, p. 17.
    Mamuya SH, Bråtveit M, Mashalla Y, et al. High prevalence of respiratory symptoms among workers in the development section of a manually operated coal mine in a developing country: a cross sectional study. BMC Public Health. 2007;7:17.
    Mamuya, S. H., Bråtveit, M., Mashalla, Y., & Moen, B. E. (2007). High prevalence of respiratory symptoms among workers in the development section of a manually operated coal mine in a developing country: a cross sectional study. BMC Public Health, 7, p. 17.
    Mamuya SH, et al. High Prevalence of Respiratory Symptoms Among Workers in the Development Section of a Manually Operated Coal Mine in a Developing Country: a Cross Sectional Study. BMC Public Health. 2007 Feb 1;7:17. PubMed PMID: 17270039.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - High prevalence of respiratory symptoms among workers in the development section of a manually operated coal mine in a developing country: a cross sectional study. AU - Mamuya,Simon H D, AU - Bråtveit,Magne, AU - Mashalla,Yohana, AU - Moen,Bente E, Y1 - 2007/02/01/ PY - 2006/06/07/received PY - 2007/02/01/accepted PY - 2007/2/3/pubmed PY - 2007/2/27/medline PY - 2007/2/3/entrez SP - 17 EP - 17 JF - BMC public health JO - BMC Public Health VL - 7 N2 - BACKGROUND: Few studies of miners have been carried out in African countries; most are from South Africa, where the working conditions are assumed to be better than in the rest of Africa. Several studies have focused on respiratory disorders among miners, but development workers responsible for creating underground road ways have not been studied explicitly. This is the first study assessing the associations between exposure to dust and quartz and respiratory symptoms among coal mine workers in a manually operated coal mine in Tanzania, focusing on development workers, as they have the highest exposure to coal dust. METHODS: A cross-sectional study was carried out among 250 production workers from a coal mine. Interviews were performed using modified standardized questionnaires to elicit information on occupational history, demographics, smoking habits and acute and chronic respiratory symptoms. The relationships between current dust exposure as well as cumulative respirable dust and quartz and symptoms were studied by group comparisons as well as logistic regression. RESULTS: Workers from the development group had the highest dust exposure, with arithmetic mean of 10.3 mg/m3 for current respirable dust and 1.268 mg/m3 for quartz. Analogous exposure results for mine workers were 0.66 mg/m3 and 0.03 mg/m3, respectively; and for other development workers were 0.88 mg/m3 and 0.10 mg/m3, respectively. The workers from the development section had significantly higher prevalence of the acute symptoms of dry cough (45.7%), breathlessness (34.8%) and blocked nose (23.9%). In addition, development workers had significantly more chronic symptoms of breathlessness (17.0%) than the mine workers (6.4%) and the other production workers (2.4%). The highest decile of cumulative exposure to respirable dust was significantly associated with cough (OR = 2.91, 95% CI 1.06, 7.97) as were cumulative exposure to quartz and cough (OR = 2.87, CI 1.05, 7.88), compared with the reference consisting of the group of workers with the lowest quartile of the respective cumulative exposure. CONCLUSION: The development workers in a coal mine had more acute and chronic respiratory symptoms than the mine and the other production workers. In addition, there was an association between high cumulative coal dust and respiratory symptoms. SN - 1471-2458 UR - https://www.unboundmedicine.com/medline/citation/17270039/High_prevalence_of_respiratory_symptoms_among_workers_in_the_development_section_of_a_manually_operated_coal_mine_in_a_developing_country:_a_cross_sectional_study_ L2 - https://bmcpublichealth.biomedcentral.com/articles/10.1186/1471-2458-7-17 DB - PRIME DP - Unbound Medicine ER -