Assessment of Smoking Exposure and Covariates Smoking information was self-reported and included age at initiation, current or former smoking status, and cumulative exposure in pack-years, defined as the product of packs of cigarettes smoked per day and the number of years smoked
In the United States, the National Lung Screening Trial established the criteria for use of low-dose CT among current or former (quit within 15 yr) smokers, aged 55 to 74 years with at least a 30 pack-year smoking history (10), but no specific rationale was provided for this amount of tobacco smoking or cessation interval
Most e-cigarettes contain nicotine, which can harm adolescent and young adult brain development, and can contain chemicals that are harmful to the lungs, notes the CDC
The blend is expertly balanced, delivering a satisfying draw with a clean finish that appeals to both seasoned smokers and those seeking a more moderate experience