quit at 4 weeks smoking at 4 weeks lost to follow-up EC+ varenicline (N=20) 17 (85) 0 3 (15) EC+NRT (N=23) 14 (61) 5 (22) 4 (17) EC Only (N=26) 14 (54) 1 (4) 11 (42)

*Two smokers claiming abstinence over the phone who did not attend for CO validation are counted as non-abstainers

Table 2: Validated quit rates* in smokers using EC with and without other medications.