Table 4.

Univariate analysis of DFS and OS according to PELP1 protein expression in different subgroups

Variables	Subgroup	DFS		OS
		χ 2	P-value	χ 2	P-value
Age (years)
	≤50	1.636	0.201	1.759	0.185
	>50	1.183	0.277	1.246	0.264
Tumor size (cm)a
	≤2	4.274	0.039	3.398	0.065
	>2, ≤5	0.441	0.507	0.813	0.367
	>5	1.936	0.164	1.134	0.284
Lymph node stage
	negative	0.251	0.617	0.008	0.927
	positive	0.770	0.380	1.974	0.160
Grade
	G1	1.864	0.172	0.688	0.407
	G2	2.369	0.124	2.327	0.127
	G3	0.188	0.665	0.461	0.497
Clinical stagea
	I	1.231	0.267	1.250	0.264
	II	0.258	0.612	0.009	0.926
	III and IV	1.814	0.178	3.220	0.073
Histological type
	IDC	1.278	0.258	1.399	0.237
	ILC	1.780	0.182	1.591	0.207
	Others	0.928	0.335	0.928	0.335
Ki-67 LI
	Low (≤14 %)	0.148	0.700	0.161	0.688
	High (>14 %)	5.069	0.024	5.559	0.018
Chemotherapy
	AC	1.144	0.285	1.192	0.275
	AC-T	1.910	0.157	1.871	0.171
	Others	0.000	0.994	0.500	0.480
Radiotherapy
	No	2.806	0.094	3.262	0.071
	Yes	0.460	0.498	0.488	0.485

Abbreviations: LN, lymph node; IDC, invasive ductal carcinoma; ILC, invasive lobular carcinoma; Ki-67 LI, Ki-67 label index; AC, Adriamycin/Cyclophosphamide; AC-T, Adriamycin/Cyclophosphamide-Taxol; DFS, disease-free survival; OS, overall survival

Note: ^afor the variable, data for two cases are unavailable from medical records