Table 2.

Relationship between PIK3CA Mutation Status and Clinical-Pathological Parameters.

Characteristics	PIK3CA mutations		χ2	P value
	Mutant	Wild
Age(years)
≥49	30	38	2.664	0.103
<49	13	32
Lymph node status
Positive	20	32	0.053	0.817
Negative	23	38
Histological grade
I-II	29	47	0.001	0.974
III	14	23
ER/PR
Positive	30	50	0.036	0.850
	13	20