Table 1.

The association between smoking and the relative risk of latent tuberculosis infection, progression to active disease and mortality from active TB.

		Meta-analyses: pooled relative risks (95%C.I)
		Slama et al. 2007(6)	Lin et al. 2007(7)	Bates et al. 2007(8)
TB outcome	TB infection	~1.8 (1.5–2.1)	1.7 – 2.2 (1.5–2.8)	~1.7 (1.5–2.0)
	TB disease	~2.3 (1.8–3.0)	~2.0 (1.6–2.6)	~2.3 (2.0–2.8)
	TB mortality	~2.2 (1.3–3.7)	~2.0 (1.1–3.5)	~2.1 (1.4–3.4)

Adapted from van Zyl-Smit RN, Pai M, Yew WW, Leung CC, Zumla A, Bateman ED, et al. Global Lung Health: The Colliding Epidemics of Tuberculosis, Tobacco Smoking, HIV and COPD. Eur Respir J. 2010; 35: 27–33