Study on Clinicopathological Features and Risk Factors of Patients with Multiple Primary Breast Cancers and Thyroid Disease

Table 3

Comparison of molecular biological characteristics between the two groups (%).

Index		Observation group ()	Control group ()
Estrogen receptor	Negative	22 (55.00)	19 (47.50)	0.450	0.502
	Positive	18 (45.00)	21 (52.50)
Progesterone receptor	Negative	19 (47.50)	18 (45.00)	0.050	0.823
	Positive	21 (52.50)	22 (55.00)
Human epidermal growth factor receptor-2	Negative	22 (55.00)	19 (47.50)	0.450	0.502
	Positive	18 (45.00)	21 (52.50)
Nuclear proliferation antigen	<14%	2 (5.00)	8 (20.00)	4.114	0.043
	≥14%	38 (95.00)	32 (80.00)
Molecular typing	Breast cancer cell type A	10 (25.00)	9 (22.50)	0.100	0.992
	Breast cancer cell type B	10 (25.00)	10 (25.00)
	Human epidermal growth factor receptor-2 overexpression	10 (25.00)	11 (27.50)
	Three negative types	10 (25.00)	10 (25.00)