Table 2.

Association between the clinical characteristics and gene mutation in the children with acute lymphoblastic leukemia.

Clinical feature	Group	No. of gene mutation			P value
		None	One	Two or more
Age	<5 years	15	9	8	0.018∗
	5 years to 10 years	13	10	16	≤0.001∗∗
	≥10 years	3	6	8	0.001∗∗
Sex	Male	16	14	20	0.07
	Female	16	11	12	0.32
Risk	Standard	13	3	4	0.081
	Medium	19	18	16	0.037∗
	High	0	4	12	0.001∗∗
Organ damage	No organ	22	8	11	0.078
	Single organ	7	16	19	0.063
	Multiple organs	2	1	2	0.043∗
Time taken to enter maintenance∗	<1 year	16	8	7	0.096
	≥1 year (s)	3	9	8	0.016∗
	Recurrence or death	2	2	7	0.001∗∗

∗ refers to the time taken by the patient to move from the treatment phase (primary treatment) to the maintenance phase (maintenance therapy).