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      Respiratory and skin health among glass microfiber production workers: a cross-sectional study

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          Abstract

          Background

          Only a few studies have investigated non-malignant respiratory effects of glass microfibers and these have provided inconsistent results. Our objective was to assess the effects of exposure to glass microfibers on respiratory and skin symptoms, asthma and lung function.

          Methods

          A cross-sectional study of 102 workers from a microfiber factory (response rate 100%) and 76 office workers (73%) from four factories in Thailand was conducted. They answered a questionnaire on respiratory health, occupational exposures, and lifestyle factors, and performed spirometry. Measurements of respirable dust were available from 2004 and 2005.

          Results

          Workers exposed to glass microfibers experienced increased risk of cough (adjusted OR 2.04), wheezing (adjOR 2.20), breathlessness (adjOR 4.46), nasal (adjOR 2.13) and skin symptoms (adjOR 3.89) and ever asthma (adjOR 3.51), the risks of breathlessness (95%CI 1.68–11.86) and skin symptoms (1.70–8.90) remaining statistically significant after adjustment for confounders. There was an exposure-response relation between the risk of breathlessness and skin symptoms and increasing level of microfiber exposure. Workers exposed to sensitizing chemicals, including phenol-formaldehyde resin, experienced increased risk of cough (3.43, 1.20–9.87) and nasal symptoms (3.07, 1.05–9.00).

          Conclusion

          This study provides evidence that exposure to glass microfibers increases the risk of respiratory and skin symptoms, and has an exposure-response relation with breathlessness and skin symptoms. Exposure to sensitizing chemicals increased the risk of cough and nasal symptoms. The results suggest that occupational exposure to glass microfibers is related to non-malignant adverse health effects, and that implementing exposure control measures in these industries could protect the health of employees.

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          Most cited references 29

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          Standardization of Spirometry, 1994 Update

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            Environmental tobacco smoke and adult-onset asthma: a population-based incident case-control study.

            The authors assessed the effects of environmental tobacco smoke (ETS) on the development of asthma in adults. In the Pirkanmaa district of South Finland, all 21- to 63-year-old adults with new cases of asthma diagnosed during a 2.5-year period (n = 521 case patients, out of 441 000 inhabitants) and a random sample of control subjects from the source population (932 control subjects) participated in a population-based incident case-control study. Risk of asthma was related to workplace ETS exposure (adjusted odds ratio [OR] = 2.16; 95% confidence interval [CI] = 1.26, 3.72) and home exposure (OR = 4.77; 95% CI = 1.29, 17.7) in the past year. Cumulative ETS exposure over a lifetime at work and at home increased the risk. This study indicates for the first time that both cumulative lifetime and recent ETS exposures increase the risk of adult-onset asthma.
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              Indoor dampness and molds and development of adult-onset asthma: a population-based incident case-control study.

              Previous cross-sectional and prevalent case-control studies have suggested increased risk of asthma in adults related to dampness problems and molds in homes. We conducted a population-based incident case-control study to assess the effects of indoor dampness problems and molds at work and at home on development of asthma in adults. We recruited systematically all new cases of asthma during a 2.5-year study period (1997-2000) and randomly selected controls from a source population consisting of adults 21-63 years old living in the Pirkanmaa Hospital district, South Finland. The clinically diagnosed case series consisted of 521 adults with newly diagnosed asthma and the control series of 932 controls, after we excluded 76 (7.5%) controls with a history of asthma. In logistic regression analysis adjusting for confounders, the risk of asthma was related to the presence of visible mold and/or mold odor in the workplace (odds ratio, 1.54; 95% confidence interval, 1.01-2.32) but not to water damage or damp stains alone. We estimated the fraction of asthma attributable to workplace mold exposure to be 35.1% (95% confidence interval, 1.0-56.9%) among the exposed. Present results provide new evidence of the relation between workplace exposure to indoor molds and adult-onset asthma.
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                Author and article information

                Journal
                Environ Health
                Environmental Health
                BioMed Central
                1476-069X
                2009
                18 August 2009
                : 8
                : 36
                Affiliations
                [1 ]Institute of Occupational and Environmental Medicine, University of Birmingham, Edgbaston, Birmingham, UK
                [2 ]Cancer Center, Ramathibodhi Hospital, Faculty of Medicine, Mahidol University, Bangkok, Thailand
                [3 ]Department of Occupational Health and Safety, Faculty of Public Health, Mahidol University, Bangkok, Thailand
                [4 ]Respiratory Medicine Unit, Dept. of Internal Medicine, Institute of Clinical Medicine, University of Oulu, P.O. Box 5000, FI-90014 University of Oulu, Oulu, Finland, and Oulu University Hospital, Oulu, Finland
                1476-069X-8-36
                10.1186/1476-069X-8-36
                2739167
                19689806
                Copyright ©2009 Sripaiboonkij et al; licensee BioMed Central Ltd.

                This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                Categories
                Research

                Public health

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