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Difference between revisions of "Pack year"
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NCI defines it as:<ref>URL: [https://www.cancer.gov/publications/dictionaries/cancer-terms/def/pack-year https://www.cancer.gov/publications/dictionaries/cancer-terms/def/pack-year]. Accessed on: 2024 October 3.</ref> | NCI defines it as:<ref>URL: [https://www.cancer.gov/publications/dictionaries/cancer-terms/def/pack-year https://www.cancer.gov/publications/dictionaries/cancer-terms/def/pack-year]. Accessed on: 2024 October 3.</ref> | ||
:<math>\text{1 py} = \frac{\text{1 pack}}{day} \times \text{1 year}</math> | :<math>\text{1 py} = \frac{\text{1 pack}}{day} \times \text{1 year}</math> | ||
Note: | |||
*A standard pack has 20 cigarettes. | |||
===Examples=== | |||
====Example 1==== | |||
1 packs per day for 40 years: 40 py | |||
====Example 2==== | |||
2 packs per day for 10 years: 20 py | |||
====Example 3==== | |||
3 cigarettes per day for 50 years: 3/20 * 50 = 7.5 py | |||
==References== | ==References== | ||