Not Quite Ready to Quit

Smoking Cessation Clinical Trial

Official title: A Test of Two Clinical Methods to Prompt a Quit Attempt Among Smokers

Status Completed

Clinical Trial Summary

In our communications with the public, the investigators will call this the Not Quite Ready to Quit Smoking Study.

One new method to increase quit attempts is to have smokers reduce their cigs/day. The investigators and others have shown that reduction aided by nicotine medications can increase quit attempts and later abstinence among smokers not ready to quit. Because half of smokers are reluctant to use nicotine medications for a non-cessation reason, the investigators now propose to test whether reduction not aided by nicotine medications can be effective. Another new method to increase quit attempts is motivational counseling. The investigators previously found implementation of the brief United States Public Health Service (USPHS) Guidelines 5 Rs motivational intervention via three 15 min phone calls can provide a large increase in quitting (OR = 6.3); however, the investigators need to replicate that result. A vendor will proactively email adult, daily smokers listed in a consumer panel to recruit 560 smokers who do not plan to quit in the next month and randomize them to a) reduction counseling without the aid of nicotine medications , b) brief counseling guided by the USPHS 5 R's, or c) usual care. The first two conditions will be delivered via brief counseling calls at study onset and then 2 and 4 weeks later (total = 35 min). The usual care condition will consist of a brief (< 5 min) phone intervention followed by a quit guide. Our major hypothesis is that the incidence of quit attempts over the 6 months of the study will be greater in both the reduction and the motivational conditions than in the usual care condition. A secondary hypothesis is that the increase in quit attempts will lead to increased abstinence. Another secondary hypothesis is that beneficial effects of both treatments will be mediated by increases in self-efficacy and intentions to quit. A final hypothesis is that decreases in cigs/day and nicotine dependence will mediate the efficacy of the reduction treatment but not the motivational treatment and, conversely, that a shift in decisional balance will mediate the efficacy of the motivational treatment but not of the reduction treatment.

Clinical Trial Description

Objectives

Among smokers who wish to quit at some time but do not plan to quit in the next month:

Major Hypotheses

Major Hypothesis 1: A treatment to reduce cigs/day that does not include nicotine replacement therapy (NRT) will increase the incidence of a quit attempt (yes/no outcome).

Major Hypothesis 2: A motivational treatment based on the USPHS's 5 Rs will increase the incidence of a quit attempt (yes/no outcome)

A comparison of the two active conditions is not an objective of the study.

The current application focuses on new clinical interventions to increase quit attempts. One recent method to increase quit attempts in ambivalent smokers has been reduction of cigs/day. This method typically includes teaching ways to reduce cigs/day with the aid of nicotine replacement therapy (NRT). Recent reviews and meta-analyses have concluded reduction aided by NRT among ambivalent smokers consistently increases the probability of future quit attempts and abstinence.

Another recent clinical method to prompt quit attempts is motivational treatments. The USPHS treatment guidelines recommend smokers not ready to quit receive a briefer, somewhat different motivational treatment focusing on the "5 Rs;" i.e., a) personal relevance of smoking, b) risks of smoking, d) rewards from smoking cessation, d) roadblocks to quitting and e) repetition.

Rationale for Proposed Studies: We now propose to test the efficacy of a non-pharmacological reduction treatment for two reasons. First, many smokers are not willing to use NRT for reduction. Another reason for testing a non-pharmacological treatment for reduction is that prior studies of NRT- aided reduction have been interpreted to indicate that reducing cigs/day will increase later quitting; however, since many(but not all)recent studies suggest pretreatment with NRT alone improves quitting, it is unclear whether reduction or pretreatment is the cause of any increase quitting in prior studies.

We also propose a replication test of our 5 Rs intervention because, although the counseling technique of reviewing Relevance, Risks, Rewards, Roadblocks, and Repeat (5R's) have been part of the last two USPHS Guidelines (most recently updated in 2008), our search of PubMed, PsychINFO, NIH RePorter (database of NIH grants) and clinicaltrials.gov in 11/11 indicates no published and no current or planned test of the 5 Rs, other than our study (Carpenter et al., 2004). Clearly, more than one test of the approach recommended for >80% of smokers who are not ready to quit (Wewers, Stillman, Hartman, & Shopland, 2003) is needed. Another reason for our replication test is that our prior Journal of Consulting and Clinical Psychology (JCCP) study of the 5 Rs used a no treatment control group; thus, we wish to increase clinical relevance and methodological rigor by employing a usual care comparison condition.

Study Design Design and Rationale for Methodological Decisions: We will use a three-group (n= 560 total)Randomized Control Trial (RCT) to test whether a reduction and a 5 Rs motivational intervention each increases the incidence of a quit attempt (Table 2). The reduction and 5 Rs interventions will be time-matched with an initial 15 min call at baseline followed by two 10 min calls at 2 and 4 weeks later (total = 35 min). The usual care condition will receive a brief (< 5 min) call and mailed information about risks of smoking, self-quitting and treatment resources at the same time-points. Monitoring of cigs/day and abstinence will be via weekly online questionnaires.

Timing of treatments and measure Counseling calls Usual care: at baseline only Reduction:

baseline, Week 2, Week 4 5Rs: baseline, Week 2, Week 4

Measures for all 3 groups--all asked weekly x 4 then monthly x 5 cigs/day quit attempts abstinence mediators Subject Selection Subjects will be current smokers who do not plan to quit in the near future; i.e., about 70% of all smokers, because the purpose of our treatment is to prompt new quit attempts among ambivalent smokers.

Vulnerable Populations Not applicable

Number of Subjects 560 current smokers. We will consent 560 in an effort to have 516 who complete at least one counselor call. ;

Related Conditions & MeSH terms

• Smoking Cessation

• NCT number: NCT01866722
• Study type: Interventional
• Source: University of Vermont
• Status: Completed
• Phase: N/A
• Start date: September 2013
• Completion date: July 14, 2015