Previous pulmonary disease and family cancer history increase the risk of lung cancer among Hong Kong women |
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Authors: | Xiao-Rong Wang Ignatius T S Yu Yuk Lan Chiu Hong Qiu Zhenming Fu William Goggins Joseph S K Au Lap-Ah Tse Tze-Wai Wong |
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Institution: | (1) Department of Community & Family Medicine, Chinese University of Hong Kong, 4/F, School of Public Health, Prince of Wales Hospital, Shatin, New Territories, Hong Kong SAR, China;(2) School of Public Health and Nethersole School of Nursing, Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China;(3) Department of Clinical Oncology, Queen Elizabeth Hospital, Kowloon, Hong Kong SAR, China |
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Abstract: | Chinese women in Hong Kong have among the highest incidence and mortality of lung cancer in the world, in spite of a low prevalence
of smoking. We carried out this population-based case–control study to evaluate the associations of previous lung disease
and family cancer history with the occurrence of lung cancer among them. We selected 212 cases that were newly diagnosed with
primary lung cancer, and randomly sampled 292 controls from the community, frequency matched by age group. All the cases and
controls were lifetime nonsmokers. We estimated the main effects of preexisting asthma, pulmonary tuberculosis, pneumonia,
chronic bronchitis, and family lung/all cancer history, using unconditional logistic regression, accounting for various potential
risk factors and confounders. All of the previous lung diseases, except chronic bronchitis, were related to an elevated risk
for lung cancer, and the association with asthma was significant. Those who had more than one previous lung disease tended
to be at higher risk than those with only one of them. Positive family history of any cancer was associated with over 2-fold
risk than negative family history. The joint effect of positive history of previous pulmonary diseases and positive family
cancer history appeared to be additive, indicating the two factors acted independently. The results support an etiological
link of preexisting lung disease and family cancer history to the risk of lung cancer. |
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Keywords: | Lung cancer Prior pulmonary disease Family cancer history Case– control study |
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