Pack Years
Definition
A standardized measure of cigarette smoking, using the number of cigarette packs smoked daily multiplied by the years smoked (e.g., 1 pack per day X 20 years = 20 pack years)
Data element maturity
3: Ready for use
Data Element Guidance
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Fixed Observation Code
Cigarettes smoked total (pack per year) – Reported (LOINC/pCLOCD: 8664-5)
Recommended Terminologies
Terminology foundation
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Value set
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Value set examples
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Value set maturity
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Value set guidance
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Contact us
If you have questions about this initiative, would like to be added to our stakeholder notification list or would like to participate in our consultations, please email us.
How to cite:
Canadian Institute for Health Information. Pack Years. Accessed November 02, 2026.
