Clinical Research Directory

Smoking Cessation and Menstrual Cycle Phase

Tobacco use is a risk factor for at least 20 types of cancer and remains the leading preventable cause of cancer in Canada. Smoking cessation is an important cancer prevention strategy for the close to 2 million Canadian women who currently smoke. However, findings from controlled trials and real-world clinical settings indicate that women have greater difficulty achieving abstinence following a quit attempt than men. There is some evidence that hormonal levels and fluctuations throughout the menstrual cycle (MC) may contribute to the greater difficulty women experience when trying to quit smoking. In this study, the start of a quit attempt using nicotine replacement therapy (NRT) will be targeted to specific phases of MC. It was hypothesized that starting a quit attempt during the first half of MC (follicular phase) will result in increased quit success compared to starting during the second half of MC (luteal phase) or the usual practice of not targeting quit start date to MC phase.

Temporal Interference Methods for Addiction Treatment

This clinical study is testing whether a new non-invasive brain stimulation method, called temporal interference (TI), can reduce nicotine cravings and usage in people who vape. TI delivers mild electrical currents to the scalp in a way that targets deep brain areas involved in addiction, without the need for surgery. In this randomized controlled trial, participants will be assigned to one of three groups: TI stimulation to the nucleus accumbens, TI stimulation to the anterior insula, or a placebo (sham) condition. Each participant will attend a single stimulation session after 8 hours of nicotine abstinence and will use a custom vape device that measures real-time nicotine inhalation. Craving levels will be reported during and after the session. The study aims to determine whether TI to the insula or nucleus accumbens is more effective at decreasing cravings and nicotine inhalation, and whether either is more effective than sham stimulation. For one week after the session, participants will use a smartphone app to track nicotine use and cravings. The primary hypothesis is that TI stimulation to deep brain regions will reduce both nicotine craving and actual use, immediately after stimulation and over the following week, compared to the sham condition.

Effects of Novel E-cigarette Constituents on Adults TCORS 3.0

This study is an examination of the influence of cooling components of WS-3, WS-23, and menthol on the appeal and addiction potential of nicotine-containing e-liquids among adults.

Identify the Optimal TMS Pulse Protocol to Modulate Reward Activity

The primary goal will be to identify the optimal pulse protocol by systematically measuring the efficacy of various theta burst stimulation and repetitive rTMS protocols to increase and decrease the reward positivity in dependent smokers. The secondary objective will be to measure the protocols' effectiveness to increase decision-making capacity using the probabilistic selection task (PST). The third objective will be to specifically assess whether the TMS targets has a differential impact on state levels of craving relative to baseline (Tobacco Craving Questionnaire \[TCQ\]. The investigators plan to accomplish these three objectives using a randomized, controlled experiment involving 2 sessions.

Identify the Optimal TMS Target to Modulate Reward Activity

Our primary goal will be to identify the optimal prefrontal-cingulate target by systematically measuring the efficacy of various image-based targeting techniques to increase the reward positivity using the 10-Hz TMS protocol in dependent smokers. Our secondary objective will be to measure the targets' effectiveness to increase decision-making capacity using the probabilistic selection task (PST). Our third objective will be to specifically assess whether the TMS targets has a differential impact on state levels of craving relative to baseline (Tobacco Craving Questionnaire \[TCQ\]. We plan to accomplish these three objectives using a randomized, controlled experiment involving 3 sessions.

tDCS Plus Varenicline for Smoking Cessation

The goal of this clinical trial is to determine if active transcranial direct current stimulation (tDCS) plus varenicline is an effective, safe and accessible treatment option for smoking cessation. The main questions this trial aims to answer are: 1. Does active tDCS plus varenicline improve short-term and long-term smoking abstinence rates compared to sham tDCS plus varenicline? 2. Are the safety profiles between active tDCS plus varenicline and sham tDCS plus varenicline different? The tDCS treatment schedule includes 10 daily sessions for the first 2 weeks (M to F), followed by 5 single bi-weekly booster sessions for the remainder of the treatment period. Participants will come in-person for two follow-up sessions to assess smoking behaviour at 6- and 12-months post-treatment.

Testing the Feasibility and Acceptability of Social Media and Digital Therapeutics to Decrease Vaping Behaviors

Use of vaping products (e.g., electronic nicotine delivery systems, e-cigarettes) has been increasing rapidly, particularly among teens and young adults. With limited information on the long-term effects of vaping products, health information about vaping has been somewhat unclear in regards to associated health risks. Teens and young adults may be reluctant to disclose their use of vaping products to parents or health providers and instead turn to social media to share and seek out information regarding vaping risks and cessation supports. Thus, our current proposal outlines the use of social media to identify teens and young adults socially networking about vaping, the use of an online chatbot screen to evaluate individual cessation support needs, and the use of a digital intervention system to support vaping cessation. The mobile intervention used in this study is based on a widely-used evidence-based mobile intervention for combustible smoking (i.e., quitSTART) and has been adapted for vaping and young adults to include an in-app chatbot to guide users to tailored content and to motivate and encourage their cessation efforts. We aim to integrate our social media recruitment and online screening approach to connect individuals with this mobile app intervention, and will conduct a randomized controlled trial to evaluate user engagement with and preliminary efficacy of the digital intervention on reducing vaping behaviors among teens and young adults.

Implementation of Tobacco Cessation Programming at Community Behavioral Health Sites

The goal of this study is to: partner with Respiratory Health Association and determine barriers and unmet smoking cessation treatment needs from leaders in behavioral health organizations, treatment programs and adults who smoke (AWS) in Chicago. This will be accomplished by establishing a community advisory board (CAB) and pilot testing a community-informed smoking cessation treatment within a community behavioral health organization to determine its feasibility after addressing implementation issues.

Real-time eCounselling for Nicotine Addiction

The goal of this clinical trial is to pilot an eHealth intervention (real-time telecounselling) in nicotine addiction. The main questions it aims to answer are: Is the intervention likely to be efficacious in preventing an increase in Abstinence? Is the intervention likely to be efficacious in preventing an increase in nicotine consumption? Is the intervention likely to be efficacious in influencing Readiness to quit nicotine? How feasible is the intervention for developing a larger-scale trial? Researchers will compare a range of outcome measures between the active and control arms, to see if a pilot eHealth intervention can successfully treat nicotine addiction.

Pharmaceutically-Enhanced Reinforcement for Reduced Alcohol and Smoking

Using a randomized controlled trial (RCT), the goal of this study is to evaluate the ability of evidence based behavioral treatment (contingency management: CM) to significantly decrease alcohol use and cigarette smoking among treatment-seeking smokers with an alcohol use disorder (AUD) who have initiated pharmacotherapy (varenicline; VC) for smoking cessation.