Linked Life Data

14516144

Source:http://linkedlifedata.com/resource/pubmed/id/14516144

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SubjectPredicateObjectContext
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pubmed-article:14516144pubmed:abstractTextThe majority of cross-sectional studies have shown a higher prevalence of ventilatory impairment in welders while only few longitudinal studies were able to detect chronic effects on spirometry or bronchial responsiveness. The aim of the study was to determine the incidence of probable occupational asthma (OA), bronchial obstruction and hyperresponsiveness among 286 students entering an apprenticeship programme in the welding profession. This epidemiological prospective cohort study consisted of a baseline assessment survey and two follow-up assessments. A respiratory symptom questionnaire was administered at each visit. Spirometry and methacholine bronchial challenge test results, conducted once prior to onset of exposure and later after an average of 15 months of apprenticeship, were available for 194 subjects. The incidence of probable OA was approximately 3% (6 of 194). The incidence of bronchial hyperresponsiveness, defined as a > or = 3.2-fold decrease in the provocative concentration causing a 20% fall in the forced expiratory volume in one second from baseline to the end of the study was 11.9%. A statistically significant difference was found between the baseline and end of study for the lung function values. In particular, the forced expiratory volume per cent predicted had significantly dropped by 8.4% on average. The significance of these early pulmonary function changes in relation to possible chronic effects of exposure to welding fumes and gases remains to be explored.lld:pubmed
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pubmed-article:14516144pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:14516144pubmed:year2003lld:pubmed
pubmed-article:14516144pubmed:articleTitleIncidence of probable occupational asthma and changes in airway calibre and responsiveness in apprentice welders.lld:pubmed
pubmed-article:14516144pubmed:affiliationJoint Depts of Epidemiology and Biostatistics and Occupational Health, McGill University, Montreal, Canada.lld:pubmed
pubmed-article:14516144pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:14516144pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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