Investigation of the Association between Genetic Polymorphism of Microsomal Epoxide Hydrolase and Primary Brain Tumor Incidence

Table 2

Relationship between brain tumor patients and smoking status.

Smoking habit	Smokers	Nonsmokers
Cancer patients	38 (36%)	67 (64%)
Control	38 (25%)	112 (75%)
𝜒^2	3.5
𝑃 value	0.1