Key points are not available for this paper at this time.
All these studies agree in showing that there are more heavy smokers and fewer non-smokers among patients with lung cancer than among patients with other diseases. With one excep- tion (the difference between the proportions of non- -smokers found by McConnell, Gordon, and Jones) these differences are large enough to be important. While, therefore, the various authors have all shown
Doll et al. (1954) studied this question.