Table 2.

Risk factors for lung cancer for HIV patients and population controls

	Lung cancer (HIV/population controls), N	Unadjusted IRR (95% CI)	Adjusted IRR* (95% CI)
All	29/183	2.08 (1.41 - 3.08)	2.38 (1.61 - 3.53)
Stratification
Male gender*	27/156	2.33 (1.55 - 3.50)	2.66 (1.77 - 4.01)
Female gender	2/27	0.91 (0.22 - 3.82)	**
Native	24/179	2.13 (2.39 - 3.27)	2.56 (1.47 - 3.46)
Immigrant	5/4	6.38 (1.71 - 23.86)	**
Younger than or 50 years at index date	18/104	2.33 (1.35 - 4.04)	2.34 (1.35 - 4.06)
Older than 50 years at index date *	14/98	2.07 (1.18 - 3.63)	2.08 (1.19 - 3.65)
HIV diagnosed before 1995	18/112	2.34 (1.42 - 3.85)	2.60 (1.58 - 4.28)
HIV diagnosed after 1995 at index date	11/71	1.75 (0.93 - 3.31)	2.13 (1.12 - 4.03)
Smoker or former smoker in any quantity	29/81	3.79 (2.48 - 5.97)	4.06 (2.66 - 6.21)
Never smoked	0/35	**	**
Route of HIV infection
Men who have sex with men (MSM)	12/99	1.60 (0.88 - 2.91)	1.82 (0.99 - 3.12)
Heterosexually infected men	12/44	3.40 (1.80 - 6.45)	4.19 (2.20 - 7.96)
Heterosexually infected women	2/18	1.26 (0.30 - 5.44)	**
Injection drug user (IDU)	3/13	1.95 (1.28 - 2.94)	**
Baseline CD4 < 350 cells/μL or AIDS defining event at index date	20/111	2.70 (1.68 - 4.35)	3.25 (2.01 - 5.24)
Baseline CD4 ≥ 350 cells/μL and no AIDS defining event at index date	6/40	1.68 (0.71 - 3.96)	1.71 (0.72 - 4.03)

* All adjusted for gender and age, except the stratification on male which is only adjusted for age and age > 50 which is only adjusted for gender.

** Too few events for analysis.