[LambdaComplex]

> this one is prevalent in Asian women who have never smoked.

Does that mean the rate is lower for Asian women who do smoke?

[hgomersall]

My understanding, though not by any means an expert, is that lung cancer that non smokers tend to get is different to that which smokers tend to get.

[e40]

This is my understanding.

[s1artibartfast]

I think they just mean that the incidence is much higher in that group than would otherwise be expected.

Not all lung cancers are related to smoking, but I'm not aware of any where smoking decreases incidence or is protective.