Table 3.

Means and standard deviations of KIT and PDGFRA scores between smokers and non-smokers, between female and male, and between stages I+II and stages III+IV

	KIT score	PDGFRA score
Non-smoker (n=8)	2.375±0.875	1.000±0.707
Smoker (n=46)	2.434±0.825	1.066±0.904
	KIT score	PDGFRA score
Female (n=2)	3±0	0.5±0.5
Male (n=52)	2.432±0.822	1.039±0.906
	KIT score	PDGFRA score
Stages I+II (n=34)	2.382±0,840	0.911±0.9193
Stages III+IV (n=20)	2.500±0.806	1.200±0.8124

There are significant differences in the both scores between smokers and non-smokers, between female and male, and between stages I+II and stages III+IV. (p>0.05) (Student’s t test)