Table 4.

Distribution of the Studied Polymorphisms Among ALL Patients According to Age Group, Gender, and Origin of Disease

Parameter	Category	GSTT1		GSTM1
		Present	Null	Present	Null
Age groups	< mean years	47	14	37	24
	> mean years	52	15	32	35
Chi square (P-value)		0.006 (0.939)		2.14 (0.144)
Gender	Male	61	14	40	35
	Female	38	15	29	24
Chi square (P-value)		1.65 (0.199)		0.024 (0.877)
Origin	B-ALL	80	23	59	44
	T-ALL	19	6	10	15
Chi square (P-value)		0.032 (0.857)		2.42 (0.119)