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Asthma and lung cancer risk: A systematic investigation by the international lung cancer consortium

  • Albert Rosenberger
  • , Heike Bickeböller
  • , Valerie McCormack
  • , Darren R. Brenner
  • , Eric J. Duell
  • , Anne Tjønneland
  • , Soren Friis
  • , Joshua E. Muscat
  • , Ping Yang
  • , H. Erich Wichmann
  • , Joachim Heinrich
  • , Neonila Szeszenia-Dabrowska
  • , Jolanta Lissowska
  • , David Zaridze
  • , Peter Rudnai
  • , Eleonora Fabianova
  • , Vladimir Janout
  • , Vladimir Bencko
  • , Paul Brennan
  • , Dana Mates
  • Ann G. Schwartz, Michele L. Cote, Zuo Feng Zhang, Hal Morgenstern, Sam S. Oh, John K. Field, Olaide Raji, John R. McLaughlin, John Wiencke, Loic LeMarchand, Monica Neri, Stefano Bonassi, Angeline S. Andrew, Qing Lan, Wei Hu, Irene Orlow, Bernard J. Park, Paolo Boffetta, Rayjean J. Hung
  • University of Göttingen
  • International Agency for Research on Cancer
  • University of Toronto
  • Institute Catala Oncologia
  • Danish Cancer Society
  • Pennsylvania State University
  • Mayo Clinic Rochester, MN
  • Helmholtz Zentrum München - German Research Center for Environmental Health
  • Ludwig Maximilian University of Munich
  • Nofer Institute of Occupational Medicine
  • Maria Sklodowska-Curie Institute of Oncology
  • Blokhin Cancer Research Center
  • Fodor József National Center for Public Health
  • Specialized State Health Institute
  • Palacký University Olomouc
  • Charles University
  • Carol Davila University of Medicine and Pharmacy
  • Wayne State University
  • University of California at Los Angeles
  • University of Michigan, Ann Arbor
  • University of California at San Francisco
  • University of Liverpool
  • University of Hawaii
  • IRCCS San Raffaele Pisana - Roma
  • Dartmouth College
  • National Institutes of Health
  • Memorial Sloan-Kettering Cancer Center

Research output: Contribution to journalArticlepeer-review

80 Scopus citations

Abstract

Asthma has been hypothesized to be associated with lung cancer (LC) risk. We conducted a pooled analysis of 16 studies in the International Lung Cancer Consortium (ILCCO) to quantitatively assess this association and compared the results with 36 previously published studies. In total, information from 585 444 individuals was used. Study-specific measures were combined using random effects models. A meta-regression and subgroup meta-analyses were performed to identify sources of heterogeneity. The overall LC relative risk (RR) associated with asthma was 1.28 [95% confidence intervals (CIs) = 1.16-1.41] but with large heterogeneity (I2 = 73%, P < 0.001) between studies. Among ILCCO studies, an increased risk was found for squamous cell (RR = 1.69, 9=%, CI = 1.26-2.26) and for small-cell carcinoma (RR = 1.71, 9=% CI = 0.99-2.95) but was weaker for adenocarcinoma (RR = 1.09, 95% CI = 0.88-1.36). The increased LC risk was strongest in the 2 years after asthma diagnosis (RR = 2.13, 95% CI = 1.09-4.17) but subjects diagnosed with asthma over 10 years prior had no or little increased LC risk (RR = 1.10, 95% CI = 0.94-1.30). Because the increased incidence of LC was chiefly observed in small cell and squamous cell lung carcinomas, primarily within 2 years of asthma diagnosis and because the association was weak among never smokers, we conclude that the association may not reflect a causal effect of asthma on the risk of LC.

Original languageEnglish
Pages (from-to)587-597
Number of pages11
JournalCarcinogenesis
Volume33
Issue number3
DOIs
StatePublished - Mar 2012

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