看到了Campbell的解釋

http://www.mcspotlight.org/media/reports/campbell_china2.html

In the China study, the analysis of blood samples shows that plasma cotinine (a nicotine metabolite from tobacco smoking) is inversely associated with diseases of affluence including lung cancer but directly associated with diseases of poverty. At first glance, this finding might appear anomalous, since the smoking of manufactured cigarettes in China has been centered mostly around major metropolitan areas such as Shanghai where diseases of affluence are more common. However, high plasma cotinine levels in the rural areas where diseases of poverty predominate, are strongly associated with the use of homemade cigarettes which contain high levels of nicotine (R. Peto, personal communication). Thus the inverse association between plasma cotinine levels and diseases of affluence may be explained by the high consumption of homemade cigarettes in less affluent areas and the lower consumption of homemade cigarettes in more industrialized and more literate regions of the country.

所有跟帖： 

• 我就是在猜測旱煙和香煙也許在致癌作用上有相當大的不同。我上麵說的二者負相關是單指旱煙 -虎嗅薔薇- ♀ (771 bytes) () 12/05/2016 postreply 11:50:13

• 謝謝，同意。 -吃與活- ♂ (0 bytes) () 12/05/2016 postreply 13:15:20

• 他把肺癌歸類到富貴病，他這段話是不是在說，吸煙本身不是導致肺癌的第一因素，而富裕生活方式才是？我這麽理解他的話對不對？ -虎嗅薔薇- ♀ (0 bytes) () 12/05/2016 postreply 12:53:19

• 我也是這樣理解他的解讀，但這樣的認識是不是有道理我也不知道。一個解釋可以是煙草誘癌，但鄉下人的生活方式使癌得不到發展壯大。 -吃與活- ♂ (0 bytes) () 12/05/2016 postreply 13:19:49

• 這個不就是坎貝爾的中心思想： -虎嗅薔薇- ♀ (410 bytes) () 12/05/2016 postreply 13:48:00

• 坎貝爾有點倔強 ；） -吃與活- ♂ (47 bytes) () 12/05/2016 postreply 14:03:31

• 是有點牽強。那個負相關是China Study裏成千上萬個關聯之一，說不定就是個anomaly，沒啥意義的一個factoid而已 -虎嗅薔薇- ♀ (0 bytes) () 12/05/2016 postreply 22:09:58