49,267
edits
Difference between revisions of "Pack year"
Jump to navigation
Jump to search
no edit summary
| (5 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
'''Pack year''', abbreviated '''py''', is | [[Image:Marlboro_red_flip_top_NZ.jpg|thumb|right|Packages of cigarettes. (WC)]] | ||
'''Pack year''', abbreviated '''py''', is way to quantify the amount a person has [[smoking|smoked]]. | |||
''Pack years'' redirects here. | |||
==Definition== | ==Definition== | ||
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 pack 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. | |||
====Example 4==== | |||
Half a pack per day for 20 years: 10 py. | |||
==See also== | |||
*[[Smoking]]. | |||
==References== | ==References== | ||