Waterpipe Tobacco Cessation
Background: Waterpipe smoking contains carcinogens and toxicants such as tobacco nitrosamines and heavy metals. To date, few smoking cessation interventions targeting waterpipe tobacco smoking have been reported worldwide. The most recent Cochrane review emphasized the need for evidence on hookah tobacco use interventions since only a few trials of sufficient quality have been published. Aim: The objective of this randomized clinical trial was to examine the efficacy of contingency management (CM) for promoting initial waterpipe smoking abstinence. Methods: Thirty-nine adults completed the study. Participants were adults 18 years of age and older who smoked tobacco using a waterpipe three times or more per week for the past one year, did not smoke cigarettes, and were not planning on quitting waterpipe tobacco smoking. A two-group, repeated measures (10 study visits on Mondays and Thursdays) design was used. Participants were randomly assigned to either the contingent (n = 19) or noncontingent (n = 20) study arms. The primary study outcomes were biochemically verified prolonged abstinence and 7-day point prevalence. Results: The prolonged abstinence rate in the contingent and noncontingent groups were 42.1% and 5.0%, respectively, ( P = 0.008). The 7-day point prevalence in the contingent and noncontingent were 47.4% and 5.0%, respectively, ( P = 0.003). Conclusion: Rewards contingent on biochemically verified abstinence promote initial waterpipe tobacco cessation. This is useful information for consideration in future cessation programs for waterpipe smokers.