Table 2. First-line drugs for smoking cessation

	Studies	Sustained quit rates for 6–12 months
*NRT versus* placebo (any type of NRT)**	117	1.60 (1.53–1.68)
*Bupropion SR versus* placebo**	31	1.69 (1.53–1.85)
*Varenicline versus* placebo**	14	2.27 (2.02–2.55)

Data are presented as n or risk ratio (95% CI). NRT: nicotine replacement therapy. Data from [8–10].