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Pharmaceutical care Pack-Years of Smoking prepared by Refaa AlAjmi. Pack-Years of Smoking. Calculating Smoking History is a simple process . It is calculated by multiplying the number of packs of cigarettes smoked per day by the number of years the person has smoked.
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Pharmaceutical care Pack-Years of Smokingprepared by RefaaAlAjmi
Pack-Years of Smoking Calculating Smoking History is a simple process. It is calculated by multiplying the number of packs of cigarettes smoked per day by the number of years the person has smoked. pack year history = number of packs per day X number of years smoking For example, 1 pack year is equal to smoking 20 cigarettes (1 pack) per day for 1 year, or 40 cigarettes per day for half a year, and so on.
Pack-Years of Smoking To calculate smoking pack-years: – Divide the number of cigarettes smoked per day by 20 (the number of cigarettes in a pack) – Then multiply by the number of years smoked (70 cigarettes/day ÷ 20 cigarettes/pack) X 10 years = 35 pack-years (35 cigarettes/day ÷ 20 cigarettes/pack) X 20 years = 35 pack-years (20 cigarettes/day ÷ 20 cigarettes/pack) X 35 years = 35 pack-years
Examples Jill smoked 1 pack of cigarettes daily for 20 years. She has a 20 pack-year history of smoking.
Examples Frank smoked 2 packs of cigarettes daily for 20 years. He has a 40 pack-year history of smoking.
Examples Eleanor smoked 10 cigarettes (1/2 pack) per day for 20 years. She has a 10 pack-year history of smoking.