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Comparative Study
. 2010 Dec;55(4):510-5.
doi: 10.1097/QAI.0b013e3181f53783.

Lung cancer incidence and mortality among HIV-infected and HIV-uninfected injection drug users

Meredith S Shiels  1 , Stephen R Cole, Shruti H Mehta, Gregory D Kirk
Affiliations
Comparative Study

Lung cancer incidence and mortality among HIV-infected and HIV-uninfected injection drug users

Meredith S Shiels et al. J Acquir Immune Defic Syndr. 2010 Dec.

Abstract

Objectives: To examine the impact of HIV on lung cancer incidence and survival.

Design: : Prospective study of 2495 HIV-infected and HIV-uninfected injection drug users in Baltimore, MD.

Methods: Cancer data were obtained from the Maryland Cancer Registry. We estimated hazard ratios (HRs) and 95% confidence intervals (CIs) for lung cancer in 2 strata of packs of cigarettes smoked per day by HIV serostatus, and for mortality by HIV serostatus.

Results: HIV-infected participants had twice the risk (HR = 2.3; 95% CI: 1.1 to 5.1) of lung cancer. There was no evidence of an interaction between HIV and packs of cigarettes smoked per day (P interaction = 0.18). Compared with participants who smoked <1.43 packs per day, among HIV-uninfected individuals lung cancer risk was 6 times greater (HR = 5.9; 95% CI: 2.1 to 17) and among HIV-infected individuals lung cancer risk was doubled (HR = 2.1; 95% CI: 0.63 to 6.8) in persons who smoked ≥1.43 per day. Additionally, HIV was associated with 4 times the risk of death (HR = 3.8; 95% CI: 0.92 to 15) in lung cancer cases.

Conclusions: HIV was associated with increased risk of lung cancer, after adjusting for smoking. However, no evidence was observed for synergistic effects of HIV and smoking. Further, HIV was associated with poorer lung cancer survival after accounting for cancer stage.

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Figures

Figure 1
Figure 1
Adjusted survival curves for HIV-infected and HIV-uninfected lung cancer cases (A) and distant stage lung cancer cases (B) in the ALIVE study, 1988-2006.
See this image and copyright information in PMC

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