{"title":"Birth cohort-specific smoking patterns in Japan (1906–2004): a population-based study from the NC-CCAPH consortium","authors":"Shiori Tanaka , Hikaru Ihira , Tetsuya Tajima , Rieko Kanehara , Yosuke Inoue , Takehiko Doi , Nozomu Kobayashi , Yuka Kato , Yukiko Nishita , Maki Konishi , Yoko M. Nakao , Isamu Kabe , Chihiro Morioka , Seitaro Dohi , Paramita Khairan , Ahmed Arafa , Zui C. Narita , Naho Morisaki , Yukai Lu , Rei Otsuka , Manami Inoue","doi":"10.1016/j.lanwpc.2025.101562","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><div>This study aimed to estimate Japan’s age-specific history of smoking prevalence, initiation, cessation, and intensity by birth cohort, using data from multiple cohort studies.</div></div><div><h3>Methods</h3><div>We pooled data from eight eligible cohorts surveyed between 1989 and 2020 as part of the National Center Cohort Collaborative for Advancing Population Health (NC-CCAPH). An Age-Period-Cohort model was employed to estimate birth cohort- and sex-specific smoking patterns for individuals born between 1920 and 1999.</div></div><div><h3>Findings</h3><div>Among 393,023 participants (40.9% female, mean age 51.8 years), smoking prevalence peaked in early adulthood (20s–30s) and declined with increasing age. Recent birth cohorts showed lower prevalence and smoking initiation in both sexes, albeit with increases in mid-female cohorts (1960s–1980s). Smoking cessation surged in the late 1990s and peaked around 2010, coinciding with tax-driven cigarette price hikes. Peak cigarette consumption occurred in 1990, followed by a steady decline. However, all birth cohorts maintained a mean consumption above 10 cigarettes smoked per day for both sexes.</div></div><div><h3>Interpretation</h3><div>This study highlights a generational shift in smoking behavior, in which younger birth cohorts smoked less and quit earlier than older birth cohorts. The study also reveals that smoking behaviors in males were strongly influenced by cigarette accessibility, such as price increases, while smoking initiation in females was more likely affected by societal changes, especially in the evolving roles of women. Smoking intensity remained stable across cohorts and sexes, emphasizing the need for stronger health policies, including higher tobacco taxes, to further reduce smoking and its health impact.</div></div><div><h3>Funding</h3><div>This study was conducted within the National Center Cohort Collaborative for Advancing Population Health (NC-CCAPH) and supported by grants from the <span>Japan Health Research Promotion Bureau</span> (JH) (<span><span>2019-(1)-1, 2024-B-05</span></span>).</div></div>","PeriodicalId":22792,"journal":{"name":"The Lancet Regional Health: Western Pacific","volume":"58 ","pages":"Article 101562"},"PeriodicalIF":7.6000,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The Lancet Regional Health: Western Pacific","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666606525000999","RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"HEALTH CARE SCIENCES & SERVICES","Score":null,"Total":0}
引用次数: 0
Abstract
Background
This study aimed to estimate Japan’s age-specific history of smoking prevalence, initiation, cessation, and intensity by birth cohort, using data from multiple cohort studies.
Methods
We pooled data from eight eligible cohorts surveyed between 1989 and 2020 as part of the National Center Cohort Collaborative for Advancing Population Health (NC-CCAPH). An Age-Period-Cohort model was employed to estimate birth cohort- and sex-specific smoking patterns for individuals born between 1920 and 1999.
Findings
Among 393,023 participants (40.9% female, mean age 51.8 years), smoking prevalence peaked in early adulthood (20s–30s) and declined with increasing age. Recent birth cohorts showed lower prevalence and smoking initiation in both sexes, albeit with increases in mid-female cohorts (1960s–1980s). Smoking cessation surged in the late 1990s and peaked around 2010, coinciding with tax-driven cigarette price hikes. Peak cigarette consumption occurred in 1990, followed by a steady decline. However, all birth cohorts maintained a mean consumption above 10 cigarettes smoked per day for both sexes.
Interpretation
This study highlights a generational shift in smoking behavior, in which younger birth cohorts smoked less and quit earlier than older birth cohorts. The study also reveals that smoking behaviors in males were strongly influenced by cigarette accessibility, such as price increases, while smoking initiation in females was more likely affected by societal changes, especially in the evolving roles of women. Smoking intensity remained stable across cohorts and sexes, emphasizing the need for stronger health policies, including higher tobacco taxes, to further reduce smoking and its health impact.
Funding
This study was conducted within the National Center Cohort Collaborative for Advancing Population Health (NC-CCAPH) and supported by grants from the Japan Health Research Promotion Bureau (JH) (2019-(1)-1, 2024-B-05).
期刊介绍:
The Lancet Regional Health – Western Pacific, a gold open access journal, is an integral part of The Lancet's global initiative advocating for healthcare quality and access worldwide. It aims to advance clinical practice and health policy in the Western Pacific region, contributing to enhanced health outcomes. The journal publishes high-quality original research shedding light on clinical practice and health policy in the region. It also includes reviews, commentaries, and opinion pieces covering diverse regional health topics, such as infectious diseases, non-communicable diseases, child and adolescent health, maternal and reproductive health, aging health, mental health, the health workforce and systems, and health policy.