Onset of Regular Smoking Before Age 21 and Subsequent Nicotine Dependence and Cessation Behavior Among US Adult Smokers.

This study assessed the association of regular smoking initiation before age 21 years with nicotine dependence and cessation behaviors among US adult smokers. Data came from the 2014-2015 Tobacco Use Supplement to the Current Population Survey. We found that onset of regular smoking at age 18 to 20 years was associated with higher odds of nicotine dependence and lower odds of attempting and intending to quit. These outcomes were observed with regular smoking initiation at age 18 to 20 as well as before age 18, suggesting that efforts to prevent access to tobacco products before age 21 could reduce nicotine addiction and promote cessation later in life.

Awareness and Ever Use of "Heat-Not-Burn" Tobacco Products Among U.S. Adults, 2017.

INTRODUCTION: Heated tobacco products, sometimes marketed as "heat-not-burn" technology, represent a diverse class of products that heat leaf tobacco to produce an inhaled aerosol. Global sales of heated tobacco products are increasing; however, the extent of current heated tobacco product awareness and use in the U.S. is unknown. This study assessed awareness and ever use of heated tobacco products among U.S. adults. METHODS: Data were obtained from the 2017 SummerStyles, an Internet survey of U.S. adults aged ≥18 years (N=4,107). Respondents were given a description of heated tobacco products, then asked about awareness and ever use. In 2017, descriptive statistics were calculated overall and by sex, age, race/ethnicity, and cigarette smoking status. Logistic regression was used to calculate AORs. RESULTS: In 2017, a total of 5.2% of U.S. adults were aware of heated tobacco products, including 9.9% of current cigarette smokers. Overall, 0.7% of U.S. adults, including 2.7% of current smokers, reported ever use of heated tobacco products. Odds of ever use were higher among current smokers (AOR=6.18) than never smokers, and higher among adults aged <30 years (AOR=3.35) than those aged ≥30 years. CONCLUSIONS: As of July 2017, few U.S. adults had ever used heated tobacco products; however, about one in 20 were aware of the products, including one in ten cigarette smokers. The uncertain impact of heated tobacco products on individual- and population-level health warrants timely and accurate public health surveillance. These first estimates among U.S. adults can serve as a key baseline measure.