Volume 7 Supplement 1

Proceedings of the 13th International Conference on Malignancies in AIDS and Other Acquired Immunodeficiencies (ICMAOI)

Open Access

Incidence and risk factors for lung cancer among women in the women's interagency HIV study (WIHS) and men in the multicenter AIDS cohort study (MACS)

  • Nancy A Hessol1Email author,
  • Otoniel Martinez-Maza2,
  • Alexandra Levine3,
  • Charles R RinaldoJr.4,
  • Joseph B Margolick5,
  • Mardge H Cohen6,
  • Lisa P Jacobson7 and
  • Eric C Seaberg8
Infectious Agents and Cancer20127(Suppl 1):O24

DOI: 10.1186/1750-9378-7-S1-O24

Published: 19 April 2012

Background

Studies have reported an increased incidence of lung cancer among people with HIV/AIDS compared to population estimates [1], but it is unclear whether this increase is due to HIV or to other lung cancer risk factors such as cigarette smoking. One study found that HIV-infected adults with preexisting lung disease displayed trends for increased lung cancer risk [2]. Another study of people with AIDS reported that individuals with recurrent pneumonia were at significantly higher lung cancer risk than those without [3]. Our aims were to determine the incidence and risk factors for lung cancer among participants in two longitudinal studies of HIV infection in United States women and men.

Methods

Data from 3763 women in the WIHS and 6972 men in the MACS were analyzed and incidence rates (IR) per 100,000 person-years and rate ratios (IRR) were calculated.

Results

We identified 44 lung cancer cases (33 HIV+ and 11 HIV-), 25 in the WIHS and 19 in the MACS, all with a history of smoking cigarettes. Among current and former smokers, the IR was significantly higher in the WIHS than in the MACS (WIHS IR=110.4 and MACS IR=35.8, p<0.001) but did not differ by HIV status. In multivariable analyses of the MACS participants, >30 pack-years of smoking (IRR=10.2) and a prior AIDS diagnosis (IRR=4.9) were significantly associated with an increased lung cancer rate. In multivariable analyses of the WIHS participants, age >49 (IRR=2.9 for 50-59; IRR=10.1 for 60+), Black race (IRR=4.6), >9 pack-years of smoking (IRR=14.7 for 10-30 pack-years; IRR=20.7 for >30 pack-years), and prior AIDS pneumonia (IRR=7.5) were significantly associated with and increased rate of lung cancer while more recent year of cohort enrollment (IRR=0.4 for 2001-2002) was associated with a lower rate.

Conclusions

HIV infection was not associated with lung cancer in the WIHS and was no longer significant in the MACS after adjustment for a prior AIDS diagnosis. A prior diagnosis of AIDS pneumonia was a risk factor for lung cancer in the WIHS. Pack-years of smoking was a strong risk factors for lung cancer in both cohorts but was twice as strong in the WIHS. A better understanding of the effect of HIV on lung cancer is needed but cessation of smoking is an ideal goal for HIV-infected individuals.

Authors’ Affiliations

(1)
Departments of Clinical Pharmacy & Medicine, University of California
(2)
Department of Obstetrics & Gynecology, University of California
(3)
City of Hope National Medical Center
(4)
Keck School of Medicine, University of Southern California
(5)
Department of Pathology, University of Pittsburgh
(6)
Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University
(7)
Department of Medicine, Stroger (formerly Cook County Hospital), Rush University
(8)
Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University

References

  1. Engels EA, Biggar RJ, Hall HI, et al: Cancer risk in people infected with human immunodeficiency virus in the United States. Int J Cancer. 2008, 123: 187-194. 10.1002/ijc.23487.View ArticlePubMedGoogle Scholar
  2. Kirk GD, Merlo C, O'Driscoll P, et al: HIV infection is associated with an increased risk for lung cancer, independent of smoking. Clin Infect Dis. 2007, 45: 103-110. 10.1086/518606.PubMed CentralView ArticlePubMedGoogle Scholar
  3. Shebl FM, Engels EA, Goedert JJ, et al: Pulmonary infections and risk of lung cancer among persons with AIDS. J Acquir Immune Defic Syndr. 2010, 55: 375-379. 10.1097/QAI.0b013e3181eef4f7.PubMed CentralView ArticlePubMedGoogle Scholar

Copyright

© Hessol et al; licensee BioMed Central Ltd. 2012

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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