Comparison of smoking cessation rates of Quitline users in Korea between smokers of ultra‐low nicotine yield cigarettes and other types of cigarette: a prospective study

• Published in: Addiction (Abingdon, England) Vol. 115; no. 9; pp. 1745 - 1753
• Main Authors: Park, Eun Young, Park, Eunjung, Jeong, Bo Yoon, Park, Jinju, Lee, Do‐Hoon, Benowitz, Neal L., Lim, Min Kyung
• Format: Journal Article
• Language: English
• Published: England Blackwell Publishing Ltd 01.09.2020; John Wiley and Sons Inc
• Subjects: Abstinence; Adult; Cessation; cigarette; Cigarette smoking; Cigarettes; Counseling; Demography; Drug addiction; Drug dependence; Efficacy; Humans; Male; Middle Aged; Nicotine; Nicotine - administration & dosage; Personal information; Prospective Studies; prospective study; Republic of Korea - epidemiology; Research Report; Research Reports; smokers; Smoking; Smoking - epidemiology; Smoking cessation; Smoking Cessation - statistics & numerical data; Tobacco; Tobacco Products - analysis; Tobacco Use Disorder - epidemiology; ultra‐low nicotine yield; Young Adult; Republic of Korea; cigarette; nicotine; ultra-low nicotine yield; smokers; Cessation; prospective study
• ISSN: 0965-2140; 1360-0443; 1360-0443
• DOI: 10.1111/add.15021

Aims It is not known whether the machine‐smoked nicotine yield of usual brand of cigarette smoked is associated with the chances of success of quit attempts. This study aimed to assess this association. Design Prospective study. Setting Republic of Korea. Participants A total of 16 808 male smokers registered for the Quitline between 7 April 2006 and 31 December 2013. Of these, 13 176 participants who were > 19 years of age and provided data on their demographic characteristics, smoking‐related behaviors, nicotine dependence, tobacco brands used and self‐efficacy were included in this study. Measurements Machine‐smoked nicotine yield was based on information provided by tobacco companies on cigarette packages that smokers reported as their usual brand. Ultra‐low nicotine yield was defined as ≤ 0.1 mg machine‐smoked nicotine yield per cigarette, whereas higher nicotine yield was defined as > 0.1 mg machine‐smoked nicotine yield. Participant personal information and self‐reported continuous abstinence at 1‐month, 6‐month and 1‐year follow‐up were recorded in electronic databases. Findings Continuous abstinence rates in the ultra‐low nicotine yield versus higher nicotine yield groups were, respectively, 40.7 versus 34.6% at 1 month [odds ratio (OR) = 1.22, 95% confidence interval (CI) = 1.12–1.33], 22.7 versus 18.8% at 6 months (OR = 1.20, 95% CI = 1.08–1.32) and 19.5 versus 16.6% (OR = 1.19, 95% CI = 1.10–1.29) at 1 year. The association between ultra‐low nicotine yield cigarette smoking and successful quitting was stronger among the smokers with higher cigarette dependence. Conclusions Male smokers who use the Korean Quitline are more likely to quit successfully if they smoke ultra‐low nicotine yield cigarettes than if they smoke higher nicotine yield cigarettes.