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Brief Title: Smoking Cessation and Menstrual Cycle Phase
Official Title: Coordinating Smoking Cessation Treatment With Menstrual Cycle Phase to Improve Quit Outcomes: A Randomized Controlled Trial
Study ID: NCT05515354
Brief Summary: 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.
Detailed Description: Evidence for the influence of the menstrual cycle (MC) phase on smoking cessation outcomes is contradictory and has been limited by small samples and a lack of clarity surrounding ideal quit date timing. Therefore, this large rigorously designed study aims to clarify whether targeting quit date to either the follicular or luteal phase of MC improves quit success. The primary hypothesis states that participants assigned a TQD in the follicular phase of their MC will be more likely to have quit successfully on day 7 of treatment than participants setting their own TQD (usual care). Quit rates at the end of treatment and 6 months post-TQD were identified as secondary objectives. Participants will enroll in an online smoking cessation program providing nicotine replacement therapy (NRT) and behavioral support. Participants will receive a 6-week supply of NRT consisting of nicotine patch plus their choice of nicotine gum or lozenge, which the participants will be instructed to start on their target quit date (TQD). Eligible individuals will be randomized to a TQD: \[1\] during the mid-luteal phase of their MC (6-8 days pre-onset of menses), \[2\] during the mid-follicular phase of their MC (6-8 days post-onset of menses), or \[3\] within 30 days of enrollment with no regard to MC phase (usual care). Behavioural support will consist of a free downloadable app (My Change Plan) and brief videos delivered via e-mail. These videos will be produced by the CAMH Nicotine Dependence Service and will focus on health behavior change strategies such as building a quit plan, coping with cravings, and relapse prevention.
Minimum Age: 18 Years
Eligible Ages: ADULT
Sex: FEMALE
Healthy Volunteers: No
Centre for Addiction and Mental Health, Nicotine Dependence Clinic, Toronto, Ontario, Canada
Name: Laurie A Zawertailo, PhD
Affiliation: Centre for Addiction and Mental Health
Role: PRINCIPAL_INVESTIGATOR