percentage of americans that smoke cigarettes Chart: The U.S. States The Most Total cigarette consumption in the

Example 1: Consistent Smoking Cigarettes per day: 10 Years smoked: 30 Packs per day = 10 divided by 20 = 0.5 packs per day Pack years = 0.5 multiplied by 30 = 15 pack years Example 2: Heavy Smoking Cigarettes per day: 40 Years smoked: 15 Packs per day = 40 divided by 20 = 2 packs per day Pack years = 2 multiplied by 15 = 30 pack years Example 3: Intermittent Smoking Cigarettes per day: 15 (on average) Years smoked: 25 (with some periods of not smoking) Packs per day = 15 divided by 20 = 0.75 packs per day Pack years = 0.75 multiplied by 25 = 18.75 pack years Factors to Consider When Calculating Pack Years While the formula for calculating pack years is simple, there are some nuances to keep in mind: Inconsistent Smoking Patterns: Some individuals may have smoked heavily at certain times and lightly or not at all at other times

Tobacco is the single most important cause of cancer in the world, and accounts for 1 in 4 cancer deaths in the UK

Crowdcaller Merdon was tired from his late-night practice, but he had to wake up at 4 AM

Liu C, Hu J, McAdam KG

As of the most recent CDC data, only about 9% of US adults still smoke cigarettes, the lowest rate on record