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What causes cryptogenic fibrosing alveolitis? A case-control study of environmental exposure to dust.
BMJ : British Medical Journal 1990 November 4
OBJECTIVE: To investigate the role of occupational and domestic exposure to dust in the aetiology of cryptogenic fibrosing alveolitis.
DESIGN: Matched case-control study.
SUBJECTS: 40 Patients with cryptogenic fibrosing alveolitis and 106 community controls matched for age and sex who responded to a questionnaire.
MAIN OUTCOME MEASURE: Responses to self administered questionnaire asking about lifetime exposure to dust, animals, and smoke at home and at work.
RESULTS: The patients with cryptogenic fibrosing alveolitis were more likely to report occupational exposure to metal dust (matched odds ratio 10.97 (95% confidence interval 2.30 to 52.4), p less than 0.001) or wood dust (2.94 (0.87 to 9.90), p = 0.08), to have worked with cattle (10.89 (1.24 to 96.0), p = 0.01), and to have lived in a house heated by a wood fire (12.55 (1.04 to 114), p = 0.009). A history of smoking and social class based on occupation were not significantly related to disease state.
CONCLUSION: Environmental exposure to dust may be an important factor in the aetiology of cryptogenic fibrosing alveolitis.
DESIGN: Matched case-control study.
SUBJECTS: 40 Patients with cryptogenic fibrosing alveolitis and 106 community controls matched for age and sex who responded to a questionnaire.
MAIN OUTCOME MEASURE: Responses to self administered questionnaire asking about lifetime exposure to dust, animals, and smoke at home and at work.
RESULTS: The patients with cryptogenic fibrosing alveolitis were more likely to report occupational exposure to metal dust (matched odds ratio 10.97 (95% confidence interval 2.30 to 52.4), p less than 0.001) or wood dust (2.94 (0.87 to 9.90), p = 0.08), to have worked with cattle (10.89 (1.24 to 96.0), p = 0.01), and to have lived in a house heated by a wood fire (12.55 (1.04 to 114), p = 0.009). A history of smoking and social class based on occupation were not significantly related to disease state.
CONCLUSION: Environmental exposure to dust may be an important factor in the aetiology of cryptogenic fibrosing alveolitis.
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