Pack-years

Pack-year cumulative tobacco exposure

Lifetime cigarette exposure, used to estimate the risk of smoking-related disease and to check eligibility for lung cancer screening. Pack-years = (cigarettes per day divided by 20) x years smoked.

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Appears in these tutorials

See this calculator worked on a real patient, then read the teaching around it.

Smoking cessation11_028
Worked example: Jim Marshall, 42
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Chronic obstructive pulmonary disease16_005
Worked example: Jim, 54
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Lung cancer16_011
Worked example: Greg Harris, 67
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