title: Previous lung diseases and lung cancer risk: a pooled analysis from the International Lung Cancer Consortium.
abstract: To clarify the role of previous lung diseases (chronic bronchitis, emphysema, pneumonia, and tuberculosis) in the development of lung cancer, the authors conducted a pooled analysis of studies in the International Lung Cancer Consortium. Seventeen studies including 24,607 cases and 81,829 controls (noncases), mainly conducted in Europe and North America, were included (1984-2011). Using self-reported data on previous diagnoses of lung diseases, the authors derived study-specific effect estimates by means of logistic regression models or Cox proportional hazards models adjusted for age, sex, and cumulative tobacco smoking. Estimates were pooled using random-effects models. Analyses stratified by smoking status and histology were also conducted. A history of emphysema conferred a 2.44-fold increased risk of lung cancer (95% confidence interval (CI): 1.64, 3.62 (16 studies)). A history of chronic bronchitis conferred a relative risk of 1.47 (95% CI: 1.29, 1.68 (13 studies)). Tuberculosis (relative risk = 1.48, 95% CI: 1.17, 1.87 (16 studies)) and pneumonia (relative risk = 1.57, 95% CI: 1.22, 2.01 (12 studies)) were also associated with lung cancer risk. Among never smokers, elevated risks were observed for emphysema, pneumonia, and tuberculosis. These results suggest that previous lung diseases influence lung cancer risk independently of tobacco use and that these diseases are important for assessing individual risk.
authors.affiliation: Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada.
authors.forename: Darren R
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authors.lastname: Szeszenia-Dabrowska
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authors.lastname: Lissowska
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authors.forename: Eleonora
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authors.lastname: Fabianova
authors.forename: Lenka
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authors.lastname: Foretova
authors.forename: Vladimir
authors.initials: V
authors.lastname: Janout
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authors.lastname: Bencko
authors.forename: Miriam
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authors.lastname: Schejbalova
authors.forename: Paul
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authors.lastname: Brennan
authors.forename: Ioan N
authors.initials: IN
authors.lastname: Mates
authors.forename: Philip
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authors.forename: Geoffrey
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authors.lastname: Liu
authors.forename: John
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authors.lastname: Wiencke
authors.forename: Monica
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authors.lastname: Neri
authors.forename: Donatella
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authors.lastname: Ugolini
authors.forename: Angeline S
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authors.lastname: Andrew
authors.forename: Qing
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authors.lastname: Lan
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mesh_terms: D029481:Bronchitis, Chronic / Q000150:complications*; D006801:Humans; D016015:Logistic Models; D008175:Lung Neoplasms / Q000209:etiology*; D011014:Pneumonia / Q000150:complications*; D016016:Proportional Hazards Models; D011656:Pulmonary Emphysema / Q000150:complications*; D012306:Risk; D012307:Risk Factors; D057566:Self Report; D014397:Tuberculosis, Pulmonary / Q000150:complications*