pack-year
plural of spark plug
plural of Mayhugh
(medicine, smoking) A unit for measuring the number of cigarettes a person has smoked previously; it is calculated by multiplying the average number of packs of cigarettes the person smokes per day by the number of years the person has smoked.
plural of trick wig
患者の肺がんリスクは、過去に40パックイヤーに相当する喫煙歴の一部に起因していた。
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