Table 1.

The statistical test result for categorical annotation in different groups.

	Cluster1	Cluster2	P value by chi-square test
ER
Negative	2	11	0.003
Positive	13	4
Positive Percent	0.87	0.27
PR
Negative	4	13	0.003
Positive	11	2
Positive Percent	0.73	0.13
HER2
Negative	13	13	0.023
Positive	2	2
Positive Percent	0.13	0.13