Youth Using E-cigarettes Three Times as Likely to Become Daily Cigarette Smokers, Says Study by Colleen Fleiss on January 11, 2021 at 11:44 PM The use of tobacco products before 18 years is a key risk factor for people to become daily cigarette smokers, revealed an analysis of a large nationally representative longitudinal study by University of California San Diego Herbert Wertheim School of Public Health and Human Longevity Science. Reporting in the January 11, 2021 online edition of Pediatrics, researchers found that in 2014 people age 12 to 24 who used e-cigarettes were three times as likely to become daily cigarette smokers in the future. Among those who reported using a tobacco product, daily use increased with age through age 28. Daily cigarette smoking nearly doubled between 18 to 21 year olds (12 percent) and 25 to 28 year olds (21 percent).