Table II.

Correlation between TRIM28 expression and the clinicopathological characteristics of patients with breast cancer in GSE42568.

		TRIM28 expression
Clinicopathological characteristic	Number of patients	High	Low	Pearson's χ2 value	P-value
Age (years old)				5.797	0.016
≤50	27	4	23
>50	77	31	46
ER expression status				1.187	0.276
Positive	67	25	42
Negative	34	9	25
Tumor size (cm)				2.813	0.093
<2	18	3	15
≥2	86	32	54
Elston grade				3.454	0.178
I	11	3	8
II	40	8	32
III	53	24	29
Lymph node metastasis				1.734	0.188
Yes	59	23	36
No	45	12	33
Tumor recurrence				8.122	0.004
Yes	48	23	25
No	56	12	44

The top 1/3 of patients with the highest TRIM28 expression were defined as the high-expression group and the bottom 2/3 were defined as the low-expression group. P-values were obtained through the Pearson χ² test for the comparison of the two groups (high vs. low) in different clinicopathological characteristics of patients with BC. ER, estrogen receptor; TRIM28, tripartite motif containing 28.