摘要：The effect of snus use on smoking behaviors among US young adults is largely unknown. Data from the Minnesota Adolescent Community Cohort Study collected in 2010 to 2011 and 2011 to 2012 (participants aged 20–28 years) showed that young adult nonsmokers who had tried snus were subsequently more likely than those who had not tried snus to become current smokers (n = 1696; adjusted odds ratio = 1.79; 95% confidence interval = 1.01, 3.14). Snus use was not associated with subsequent smoking cessation or reduction among young adult current smokers (n = 488; P > .46). Tobacco use is the leading preventable cause of death in the United States. 1 Snus, made of finely cut smokeless tobacco leaves packaged in small bags, was recently introduced in the United States and sales reached more than 1 million pounds in 2011. 2 Swedish studies found that snus use was not associated with smoking initiation but was positively associated with smoking cessation. 3,4 However, a US study showed that the effect of snus use in Sweden is unlikely to be replicated in the United States, at least on smoking cessation. 5 To date, no longitudinal studies have examined whether snus use promotes smoking among nonsmokers, or cessation among smokers, in young adults in the United States, who are still developing their tobacco use behaviors and have the highest prevalence of smoking in all ages. 6,7 We used data collected from the Minnesota Adolescent Community Cohort Study to examine if snus use was associated with progression of smoking among young adult nonsmokers and smoking cessation and reduction among young adult current smokers.
