Memorial University DAI: The prevalence of symptomatic chronic bronchitis in two iron ore processing plants

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Title	The prevalence of symptomatic chronic bronchitis in two iron ore processing plants
Author	Ryan, Mary Catherine, 1945-
Description	Thesis (M.Sc.)--Memorial University of Newfoundland, 1983. Medicine
Date	1983
Pagination	viii, 98 leaves : ill.
Subject	Bronchitis; Occupational diseases; Tobacco--Physiological effect
Degree	M.Sc.
Degree Grantor	Memorial University of Newfoundland. Faculty of Medicine
Discipline	Medicine
Language	Eng
Notes	Bibliography: leaves 76-86.
Abstract	This 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.
Type	Text
Resource Type	Electronic thesis or dissertation
Format	Image/jpeg; Application/pdf
Source	Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries
Local Identifier	75251397
Rights	The 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.
Collection	Electronic Theses and Dissertations
Scanning Status	Completed
PDF File	(19.92 MB) -- http://collections.mun.ca/PDFs/theses/Ryan_MaryCatherine.pdf
CONTENTdm file name	82626.cpd