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Difference between revisions of "Pack year"
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[[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 year''', abbreviated '''py''', is way to quantify the amount a person has [[smoking|smoked]]. | ||
''Pack years'' redirects here. | |||
==Definition== | ==Definition== | ||
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===Examples=== | ===Examples=== | ||
====Example 1==== | ====Example 1==== | ||
1 | 1 pack per day for 40 years: 40 py. | ||
====Example 2==== | ====Example 2==== | ||
2 packs per day for 10 years: 20 py | 2 packs per day for 10 years: 20 py. | ||
====Example 3==== | ====Example 3==== | ||
3 cigarettes per day for 50 years: 3/20 * 50 = 7.5 py | 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== | ==See also== | ||