A Smoking Cessation Study to Understand the Biological and Functional Changes After One Year of Smoking Cessation

A Multi-center, Multi-region Smoking Cessation Study to Understand the Biological and Functional Changes Related to Smoking Cessation in Healthy Smokers Who Are Continuously Abstinent From Smoking for One Year

The purpose of this study was to understand the biological and functional changes after one year of smoking cessation and to collect data on a broad range of biomarkers of exposure (BoExp) and biomarkers of effect (BoE).

This was a 12 month, multi-region, multi-center, ambulatory study conducted in the US, Japan and Europe. Smokers who were willing to quit smoking within the next 30 days at the Screening Visit were enrolled to reach approximately 950 subjects continuously abstinent from smoking from Actual Quit Date (AQD) onwards at week 2, in order to achieve at least 190 successful quitters expected to complete the study. Once approximately 950 subjects reached week 2, screening and enrollment were stopped.

Compliance with smoking abstinence was verified by self-reporting, CO breath tests, and urine cotinine tests. Smokers who were not continuously abstinent from smoking [i.e., free from tobacco product use (e.g., CC, pipes, cigars, snus) or any nicotine-containing product (including electronic cigarettes) other than nicotine replacement therapy (NRT)] from their AQD onwards were discontinued from the study. At the end of the study, 358 subjects were verified as continuously abstinent from their AQD.

Inclusion Criteria:

• Current healthy smoker as judged by the Principal Investigator(s) or designee(s).
• Subject is aged from 30 to 65 years old (inclusive).
• Subject has smoked for at least the last 10 years.
• Subject smoked more than 10 cigarettes/day on average over the last year.
• Subject is willing to quit smoking within the next 30 days.

Exclusion Criteria:

• Subject has clinically relevant medical conditions that in the opinion of the Investigators would jeopardize the safety of the participant or affect the validity of the study results.
• Subject has Forced Expiratory Volume in 1 second/Forced Vital Capacity(FEV1/FVC) < 0.7 and FEV1 < 80% predicted value at post-bronchodilator spirometry.
• Subject with FEV1/FVC < 0.75 (post-bronchodilator) and reversibility in FEV1 that is both > 12% and > 200 ml from pre- to post-bronchodilator values.
• Subject who took or is taking concomitant medication which may have an impact on the biomarkers of effect.
• Female subject is pregnant or is a breast-feeding.