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

Table 1

Comparison of clinical characteristics between the two groups (%).

Index		Observation group ()	Control group ()
Age	≤35 years old	3 (7.50)	10 (25.00)	6.372	0.041
	35–60 years	9 (22.50)	12 (30.00)
	≥60 years old	28 (70.00)	18 (45.00)
Body mass index	<24.0 kg/m^2	10 (25.00)	9 (22.50)	0.0926	0.954
	24.0 kg/m^2–28.0 kg/m^2	12 (30.00)	13 (32.50)
	≥28.0 kg/m^2	18 (45.00)	18 (45.00)
Pregnancy times	≤2 times	20 (50.00)	21 (52.50)	0.050	0.823
	>2 times	20 (50.00)	19 (47.50)
Production number	≤2 times	21 (52.50)	19 (47.50)	0.200	0.655
	>2 times	19 (47.50)	21 (52.50)
Abortion history	Without	21 (52.50)	20 (50.00)	0.050	0.823
	Have	19 (47.50)	20 (50.00)
Menopausal status	No menopause	2 (5.00)	10 (25.00)	6.275	0.012
	Menopause	38 (95.00)	30 (75.00)