How do you work out pack years
Number of cigarettes a day/20 X no. years smoking
20 cigarettes = 1 pack
A 45 year old man has been smoking 30 cigarettes a day for 20 years calculate his pack years.
20 cigarettes = 1 pack
30/20 X 20 = 30
Impact of smoking (7)
Cancer Osteoporosis Psoriasis Peptic ulceration Crohn's disease Sarcoidosis Hypersensitivity Pneumonitis
Benefits of stopping
Increases longevity of life by 7.5 years