Re: just wondering
While it's true that early detection of cancer would be lower in the Middle East it's also true that the overall existence of aliments attributed to smoking would be identified in the latter stages and the presence and certainly anecdotal evidence would be plentiful if the problems attributed to smoking were as plentiful in the Middle East as they are in the West. Conversely the West has a huge problem with detection bias so again read up on what Colby has to say.
Of course I can think of several nations that have as good health statisics as the West with higher levels of tobacco consumption that have lower instances of illnesses attributed to tobacco use. Read the link I posted since he provides mountains of info on the subject of cross-national tobacco use and health.