回复：一年才抽30合香烟就要CT筛查了，一天平均一根多，这么少的吸烟量，也会导致肺癌？

来源: 回家路 于 2013-07-31 09:28:14 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (141 bytes)

One pack-year of smoking would mean that someone had smoked one package of cigarettes (20 cigarettes) daily for one year. TBz is right

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• Thanks for the definition of 30 pack-year history -御用文人- ♀ 给 御用文人 发送悄悄话 (0 bytes) () 07/31/2013 postreply 11:10:46

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