A patient has been smoking 2.5 packs of cigarettes per day for the past 25 years.What is his smoking history in pack years?

Question

Quizplus · Accepted Answer

One pack year is defined as smoking 20 cigarettes per day for one year. Therefore, to calculate pack years, we multiply the number of packs smoked per day by the number of years. In this case, 2.5 packs per day for 25 years is equivalent to 62.5 pack years.

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