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"pack-years" vs "pack years"

Both "pack years" and "pack-years" are correct terminologies used in the medical field to quantify the amount a person has smoked over time. The hyphenated form "pack-years" is more commonly used and preferred in medical literature.

Last Updated: March 26, 2024

pack-years

This is the preferred form in medical literature and is more commonly used.

This term is used in the medical field to quantify the number of cigarette packs smoked per day over a number of years.

Alternatives:

  • pack years
  • packyear
  • pack year
  • pack-year

pack years

This phrase is correct but less commonly used than the hyphenated form.

This term is used in the medical field to quantify the number of cigarette packs smoked per day over a number of years.

Alternatives:

  • pack-years
  • packyear
  • pack year
  • pack-year

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