{"title":"Alcohol, Smoking, and Their Synergy as Risk Factors for Incident Type 2 Diabetes","authors":"Indira Paz-Graniel PhD , Junko Kose PhD , Pauline Duquenne PhD , Nancy Babio PhD , Jordi Salas-Salvadó PhD , Serge Hercberg PhD , Pilar Galan PhD , Mathilde Touvier PhD , Léopold K. Fezeu PhD , Valentina A. Andreeva PhD","doi":"10.1016/j.amepre.2025.108011","DOIUrl":null,"url":null,"abstract":"<div><h3>Introduction</h3><div>Smoking has been independently related to an increased risk of Type 2 diabetes, whereas the role of alcohol remains controversial. The joint impact of tobacco and alcohol use on Type 2 diabetes risk is understudied. This study investigated individual and combined effects of smoking and alcohol on Type 2 diabetes risk.</div></div><div><h3>Methods</h3><div>Data from 110,076 participants in the NutriNet-Santé cohort (2009–2023), who were free from Type 2 diabetes at baseline and with alcohol and smoking data, were analyzed. Multivariable Cox regression models assessed the association of alcohol consumption (<2 vs ≥2 portions/day, <10 vs ≥10 portions/week, grams/day of ethanol) and smoking (never versus former/current smoking) with Type 2 diabetes risk. Combined effects of heavy smoking (≥20 cigarettes/day) and heavy drinking (>8 and >15 portions/week for women and men, respectively) were also evaluated.</div></div><div><h3>Results</h3><div>Over 7.5 years of follow-up (820,470 person-years), 1,175 Type 2 diabetes cases were identified. Alcohol consumption, including heavy intake, was not significantly associated with Type 2 diabetes risk. People who formerly or currently smoke had a 36% higher risk of Type 2 diabetes than people who have never smoked (hazard ratio=1.36; 95% CI=1.20, 1.53). Those who smoked heavily had over twice the risk of those who smoked lightly or moderately (hazard ratio=2.10; 95% CI=1.46, 3.02). Combined exposure to smoking and heavy alcohol use did not significantly increase Type 2 diabetes risk (hazard ratio=1.11; 95% CI=0.95, 1.29).</div></div><div><h3>Conclusions</h3><div>These findings support smoking as an independent risk factor for Type 2 diabetes and show that alcohol consumption did not confer protection. The combined effect of alcohol and tobacco use on Type 2 diabetes risk and the mechanisms behind this relationship should be further explored.</div></div><div><h3>Trial registration</h3><div>This trial is registered at NCT03335644 at ClinicalTrials.gov.</div></div>","PeriodicalId":50805,"journal":{"name":"American Journal of Preventive Medicine","volume":"69 5","pages":"Article 108011"},"PeriodicalIF":4.5000,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"American Journal of Preventive Medicine","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0749379725004969","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MEDICINE, GENERAL & INTERNAL","Score":null,"Total":0}
引用次数: 0
Abstract
Introduction
Smoking has been independently related to an increased risk of Type 2 diabetes, whereas the role of alcohol remains controversial. The joint impact of tobacco and alcohol use on Type 2 diabetes risk is understudied. This study investigated individual and combined effects of smoking and alcohol on Type 2 diabetes risk.
Methods
Data from 110,076 participants in the NutriNet-Santé cohort (2009–2023), who were free from Type 2 diabetes at baseline and with alcohol and smoking data, were analyzed. Multivariable Cox regression models assessed the association of alcohol consumption (<2 vs ≥2 portions/day, <10 vs ≥10 portions/week, grams/day of ethanol) and smoking (never versus former/current smoking) with Type 2 diabetes risk. Combined effects of heavy smoking (≥20 cigarettes/day) and heavy drinking (>8 and >15 portions/week for women and men, respectively) were also evaluated.
Results
Over 7.5 years of follow-up (820,470 person-years), 1,175 Type 2 diabetes cases were identified. Alcohol consumption, including heavy intake, was not significantly associated with Type 2 diabetes risk. People who formerly or currently smoke had a 36% higher risk of Type 2 diabetes than people who have never smoked (hazard ratio=1.36; 95% CI=1.20, 1.53). Those who smoked heavily had over twice the risk of those who smoked lightly or moderately (hazard ratio=2.10; 95% CI=1.46, 3.02). Combined exposure to smoking and heavy alcohol use did not significantly increase Type 2 diabetes risk (hazard ratio=1.11; 95% CI=0.95, 1.29).
Conclusions
These findings support smoking as an independent risk factor for Type 2 diabetes and show that alcohol consumption did not confer protection. The combined effect of alcohol and tobacco use on Type 2 diabetes risk and the mechanisms behind this relationship should be further explored.
Trial registration
This trial is registered at NCT03335644 at ClinicalTrials.gov.
期刊介绍:
The American Journal of Preventive Medicine is the official journal of the American College of Preventive Medicine and the Association for Prevention Teaching and Research. It publishes articles in the areas of prevention research, teaching, practice and policy. Original research is published on interventions aimed at the prevention of chronic and acute disease and the promotion of individual and community health.
Of particular emphasis are papers that address the primary and secondary prevention of important clinical, behavioral and public health issues such as injury and violence, infectious disease, women''s health, smoking, sedentary behaviors and physical activity, nutrition, diabetes, obesity, and substance use disorders. Papers also address educational initiatives aimed at improving the ability of health professionals to provide effective clinical prevention and public health services. Papers on health services research pertinent to prevention and public health are also published. The journal also publishes official policy statements from the two co-sponsoring organizations, review articles, media reviews, and editorials. Finally, the journal periodically publishes supplements and special theme issues devoted to areas of current interest to the prevention community.