4. Discussion
Our study shows remarkably relevant results in terms of percentage of smoking cessation, also after 1 year of follow-up. In the group with TCM alone (Group C) the percentage of non smokers after 1 year was 20.1%, a result comparable with or better than other data in the literature (Bier 20%,Wu 16,6%)[13,26].When TCM (sham or true) was combined with support group (groups A and B respectively), the percentages of smoking cessation are very high (33.1% and 34.9% respectively). Multimodal interventions are recommended by US and European guidelines for smoking cessation, because their effectiveness is higher than unimodal interventions. These results are in line with the data from other study, like for example Bier [13] who showed a 40% smoking cessation rate after 1 year with acupuncture and psychological treatment. Other authors have shown smaller percentages of success after a combination of pharmacological and psychological treatment: after 1 year of follow-up, Tonnesen showed that non smokers were 25% and had more side effects [27]. These results are consistent even if there is a non significant difference between true and sham TCM. Injection of pharmacologic substances into acupuncture points have been shown to potentiate and prolong their effects up to 3 months after the end of the treatment series [45].