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Memorial University - Electronic Theses and Dissertations 2
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Document Description
TitleThe prevalence of symptomatic chronic bronchitis in two iron ore processing plants
AuthorRyan, Mary Catherine, 1945-
DescriptionThesis (M.Sc.)--Memorial University of Newfoundland, 1983. Medicine
Date1983
Paginationviii, 98 leaves : ill.
SubjectBronchitis; Occupational diseases; Tobacco--Physiological effect
DegreeM.Sc.
Degree GrantorMemorial University of Newfoundland. Faculty of Medicine
DisciplineMedicine
LanguageEng
NotesBibliography: leaves 76-86.
AbstractThis research was undertaken to study the prevalence of symptomatic chronic bronchitis in a group of mining and mill workers to determine if there was an association between symptomatic chronic bronchitis and tobacco smoking, length of dust exposure or age, individually or synergistically. -- Analyses were done by two statistical methods. First, bivariate analysis done by cross tabulations using Chi-square as a test of significance gave the following results. –- (a) There was a significant association between tobacco smoking and symptomatic chronic-bronchitis. This association held when controlled by age and length of dust exposure. –- (b) Age was not significantly associated to symptomatic chronic bronchitis. -- (c) Length of dust exposure was not significantly associated to symptomatic chronic bronchitis. -- Second, a log-linear analysis was used to test different models for associations among the variables. The results confirmed the association between symptomatic chronic bronchitis and smoking, and showed that there were some interactive effects between the independent variables, smoking, age and length of exposure which may be explained by the correlation between age and length of exposure and by some differences in smoking habits by age.
TypeText
Resource TypeElectronic thesis or dissertation
FormatImage/jpeg; Application/pdf
SourcePaper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries
Local Identifier75251397
RightsThe author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
CollectionElectronic Theses and Dissertations
Scanning StatusCompleted
PDF File(19.92 MB) -- http://collections.mun.ca/PDFs/theses/Ryan_MaryCatherine.pdf
CONTENTdm file name82626.cpd