Difference between revisions of "Pack year"

Latest revision as of 15:38, 20 October 2024

Packages of cigarettes. (WC)

Pack year, abbreviated py, is way to quantify the amount a person has smoked.

Pack years redirects here.

NCI defines it as:^[1]

{\text{1 py}}={\frac {\text{1 pack}}{day}}\times {\text{1 year}}

Note:

1 pack per day for 40 years: 40 py.

2 packs per day for 10 years: 20 py.

3 cigarettes per day for 50 years: 3/20 * 50 = 7.5 py.

Half a pack per day for 20 years: 10 py.

@@ Line 1: / Line 1: @@
-'''Pack year''', abbreviated '''py''', is quantification of [[smoking]].
+[[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==
 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>
-py = smoking 1 pack / day x 1 year
+:<math>\text{1 py} = \frac{\text{1 pack}}{day} \times \text{1 year}</math>
+Note:
+*A standard pack has 20 cigarettes.
+===Examples===
+====Example 1====
+pack per day for 40 years: 40 py.
+====Example 2====
+packs per day for 10 years: 20 py.
+====Example 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==