Exposure to secondhand tobacco smoke and lung cancer by histological type: a pooled analysis of the International Lung Cancer Consortium (ILCCO).

Abstract

While the association between exposure to secondhand smoke and lung cancer risk is well established, few studies with sufficient power have examined the association by histological type. In this study, we evaluated the secondhand smoke-lung cancer relationship by histological type based on pooled data from 18 case-control studies in the International Lung Cancer Consortium (ILCCO), including 2,504 cases and 7,276 control who were never smokers and 10,184 cases and 7,176 controls who were ever smokers. We used multivariable logistic regression, adjusting for age, sex, race/ethnicity, smoking status, pack-years of smoking, and study. Among never smokers, the odds ratios (OR) comparing those ever exposed to secondhand smoke with those never exposed were 1.31 (95% CI: 1.17-1.45) for all histological types combined, 1.26 (95% CI: 1.10-1.44) for adenocarcinoma, 1.41 (95% CI: 0.99-1.99) for squamous cell carcinoma, 1.48 (95% CI: 0.89-2.45) for large cell lung cancer, and 3.09 (95% CI: 1.62-5.89) for small cell lung cancer. The estimated association with secondhand smoke exposure was greater for small cell lung cancer than for nonsmall cell lung cancers (OR=2.11, 95% CI: 1.11-4.04). This analysis is the largest to date investigating the relation between exposure to secondhand smoke and lung cancer. Our study provides more precise estimates of the impact of secondhand smoke on the major histological types of lung cancer, indicates the association with secondhand smoke is stronger for small cell lung cancer than for the other histological types, and suggests the importance of intervention against exposure to secondhand smoke in lung cancer prevention.

• Authors: Claire H Kim, Yuan-Chin Amy Lee, Rayjean J Hung, Sheila R McNallan, Michele L Cote, Wei-Yen Lim, Shen-Chih Chang, Jin Hee Kim, Donatella Ugolini, Ying Chen, Triantafillos Liloglou, Angeline S Andrew, Tracy Onega, Eric J Duell, John K Field, Philip Lazarus, Loic Le Marchand, Monica Neri, Paolo Vineis, Chikako Kiyohara, Yun-Chul Hong, Hal Morgenstern, Keitaro Matsuo, Kazuo Tajima, David C Christiani, John R McLaughlin, Vladimir Bencko, Ivana Holcatova, Paolo Boffetta, Paul Brennan, Eleonora Fabianova, Lenka Foretova, Vladimir Janout, Jolanta Lissowska, Dana Mates, Peter Rudnai, Neonila Szeszenia-Dabrowska, Anush Mukeria, David Zaridze, Adeline Seow, Ann G Schwartz, Ping Yang, Zuo-Feng Zhang
• Journal: International journal of cancer (Int J Cancer) Vol. 135 Issue 8 Pg. 1918-30 (Oct 15 2014) ISSN: 1097-0215 [Electronic] United States
• PMID: 24615328 (Publication Type: Journal Article, Meta-Analysis, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't)
• Copyright: © 2014 UICC.

Chemical References

• Tobacco Smoke Pollution

Topics

• Adenocarcinoma (etiology)
• Carcinoma, Non-Small-Cell Lung (etiology)
• Carcinoma, Squamous Cell (etiology)
• Case-Control Studies
• Environmental Exposure
• Humans
• Lung Neoplasms (etiology)
• Risk Factors
• Small Cell Lung Carcinoma (etiology)
• Tobacco Smoke Pollution (adverse effects)