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  • Title: Respiratory status in dairy farmers in France; cross sectional and longitudinal analyses.
    Author: Chaudemanche H, Monnet E, Westeel V, Pernet D, Dubiez A, Perrin C, Laplante JJ, Depierre A, Dalphin JC.
    Journal: Occup Environ Med; 2003 Nov; 60(11):858-63. PubMed ID: 14573716.
    Abstract:
    AIMS: To compare respiratory status in dairy farmers with that of non-farming controls. METHODS: Longitudinal study in the Doubs (France). From a cohort constituted in 1994 (T1), 215 (81.1%) dairy farmers and 110 (73.8%) controls were reevaluated in 1999 (T2). The protocol comprised a medical and occupational questionnaire, spirometric tests at both evaluations, allergological tests at T1, and a non-invasive measure of blood oxygen saturation (SpO2) at T2. RESULTS: In 1999 analyses, the prevalence of chronic bronchitis was higher (p = 0.013), and FEV1/VC (p < 0.025) and SpO2 (-0.7%, p < 0.01) lower in dairy farmers than in controls. In a multiple linear regression model, farming, age, and smoking were significantly and inversely correlated with SpO2. In the whole population, the mean annual decline in FEV1 and FEV1/VC was -13.4 ml and -0.30%, respectively. Farming was associated with an accelerated decline in FEV1/VC (p < 0.025) after adjustment for covariates. No relation between allergy and respiratory function changes was observed, except for FEF25-75. CONCLUSIONS: This prospective study shows that dairy farming is associated with an excess of chronic bronchitis, with a moderate degree of bronchial obstruction and a mild decrease in SpO2.
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