History of changes
What has changed on PackHistory, newest first.
10/8/2026
First version
- Questionnaire about cigarette smoking history, in English and Spanish.
- Pack-year calculation, with a check against the 2021 USPSTF lung cancer screening criteria.
- Summary for the care team, with a note ready to copy into the medical record and a PDF.
- Plain-language explanation of what a pack-year is.
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