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postgraduate thesis: Respiratory symptoms and pulmonary function among welders : a cross-sectional study in an automobile assembly factory in Guangzhou

TitleRespiratory symptoms and pulmonary function among welders : a cross-sectional study in an automobile assembly factory in Guangzhou
Authors
Issue Date2014
PublisherThe University of Hong Kong (Pokfulam, Hong Kong)
Citation
Mai, S. [麦诗琪]. (2014). Respiratory symptoms and pulmonary function among welders : a cross-sectional study in an automobile assembly factory in Guangzhou. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5320573
AbstractObjective: To investigate the adverse effect of welding exposure on pulmonary function test and respiratory symptoms in welders. Design: Cross-sectional study Setting: Guangzhou, China Subjects: 350 male welders in an automobile assembly factory and 350 controls in MTR corporation who had no exposure to welding fumes and toxic gases. Methods: The data was collected from Guangzhou No.12 People’s Hospital. This inclusion and exclusion criteria for subjects and controls were set. The relationship between pulmonary function, respiratory symptoms and welding exposure was investigated by comparing the prevalence of abnormal pulmonary function and respiratory symptoms among welders and non-welders. Chi-square was used for comparison of categorical variables. Logistic regression was performed to estimate odds ratios after adjustment for age, working duration and smoking habits. Results: After accounting for age, working years and smoking habit, the adjusted OR (95% C.I.) of pulmonary function among welders and non-welders was 1.425 (0.916, 2.215), suggesting that welders was associated with a 1.43 times as high the odds of being tested abnormal pulmonary function as non-welders. However, there was no significant (P=0.116) difference in odds between welders and non-welders. The differences of respiratory symptoms in odds between welders and non-welders was not significant (P>0.268). But when restricted to smokers, significant difference (p<0.05) in abnormal pulmonary function was found between welders (17.5%) and non-welders (10.6%). Of the respiratory symptoms, only prevalence of cough was found to be statistically higher (p<0.05) among welders (16.1%) who smoked than non-welders (8.0%) who smoked. Conclusion: It is not evident from my study thatwelders who worked in a well-ventilation working environment and well protected by wearing personal protective equipment are subjected to increased prevalence of abnormal pulmonary function and respiratory symptoms. Studies with larger samples and longer period of observation are warranted. Smoking was observed to be the most important factor contributing to the presence of abnormal pulmonary function and respiratory symptoms. Smoking cessation would be needed to carry out in welders.
DegreeMaster of Public Health
SubjectLungs - Diseases
Pulmonary function tests
Dept/ProgramPublic Health
Persistent Identifierhttp://hdl.handle.net/10722/206956

 

DC FieldValueLanguage
dc.contributor.authorMai, Shiqi-
dc.contributor.author麦诗琪-
dc.date.accessioned2014-12-04T23:17:22Z-
dc.date.available2014-12-04T23:17:22Z-
dc.date.issued2014-
dc.identifier.citationMai, S. [麦诗琪]. (2014). Respiratory symptoms and pulmonary function among welders : a cross-sectional study in an automobile assembly factory in Guangzhou. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5320573-
dc.identifier.urihttp://hdl.handle.net/10722/206956-
dc.description.abstractObjective: To investigate the adverse effect of welding exposure on pulmonary function test and respiratory symptoms in welders. Design: Cross-sectional study Setting: Guangzhou, China Subjects: 350 male welders in an automobile assembly factory and 350 controls in MTR corporation who had no exposure to welding fumes and toxic gases. Methods: The data was collected from Guangzhou No.12 People’s Hospital. This inclusion and exclusion criteria for subjects and controls were set. The relationship between pulmonary function, respiratory symptoms and welding exposure was investigated by comparing the prevalence of abnormal pulmonary function and respiratory symptoms among welders and non-welders. Chi-square was used for comparison of categorical variables. Logistic regression was performed to estimate odds ratios after adjustment for age, working duration and smoking habits. Results: After accounting for age, working years and smoking habit, the adjusted OR (95% C.I.) of pulmonary function among welders and non-welders was 1.425 (0.916, 2.215), suggesting that welders was associated with a 1.43 times as high the odds of being tested abnormal pulmonary function as non-welders. However, there was no significant (P=0.116) difference in odds between welders and non-welders. The differences of respiratory symptoms in odds between welders and non-welders was not significant (P>0.268). But when restricted to smokers, significant difference (p<0.05) in abnormal pulmonary function was found between welders (17.5%) and non-welders (10.6%). Of the respiratory symptoms, only prevalence of cough was found to be statistically higher (p<0.05) among welders (16.1%) who smoked than non-welders (8.0%) who smoked. Conclusion: It is not evident from my study thatwelders who worked in a well-ventilation working environment and well protected by wearing personal protective equipment are subjected to increased prevalence of abnormal pulmonary function and respiratory symptoms. Studies with larger samples and longer period of observation are warranted. Smoking was observed to be the most important factor contributing to the presence of abnormal pulmonary function and respiratory symptoms. Smoking cessation would be needed to carry out in welders.-
dc.languageeng-
dc.publisherThe University of Hong Kong (Pokfulam, Hong Kong)-
dc.relation.ispartofHKU Theses Online (HKUTO)-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsThe author retains all proprietary rights, (such as patent rights) and the right to use in future works.-
dc.subject.lcshLungs - Diseases-
dc.subject.lcshPulmonary function tests-
dc.titleRespiratory symptoms and pulmonary function among welders : a cross-sectional study in an automobile assembly factory in Guangzhou-
dc.typePG_Thesis-
dc.identifier.hkulb5320573-
dc.description.thesisnameMaster of Public Health-
dc.description.thesislevelMaster-
dc.description.thesisdisciplinePublic Health-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.5353/th_b5320573-

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