Table 3.

Correlation analysis of risk factors for patients with primary breast cancer

Variable	B	Standard error	Waldorf	P value	Exp (B)	95%CI of Exp (B)
						Lower limit	Upper limit
< 40 yr			14.059	0.001
40-59 yr	0.603	0.277	4.741	0.029	1.828	1.062	3.148
≥ 60 yr	2.059	0.568	13.128	< 0.001	7.842	2.574	23.892
Age at menarche (≤ 14 yr, > 14 yr)	0.965	0.261	13.633	< 0.001	2.626	1.573	4.384
Age at first birth	0.083	0.038	4.84	0.028	1.086	1.009	1.17
Number of births	0.266	0.176	2.291	0.13	1.305	0.924	1.843
Number of miscarriages	-0.207	0.112	3.414	0.065	0.813	0.652	1.013
Breastfeeding (mo)	-0.009	0.011	0.665	0.415	0.991	0.97	1.013
History of family malignant tumors	0.346	0.311	1.238	0.266	1.413	0.768	2.599
History of benign breast surgery	-1.355	0.489	7.664	0.006	0.258	0.099	0.673
Gynecological diseases	-0.357	0.299	1.42	0.233	0.7	0.389	1.258
Thyroid disease	-0.156	0.305	0.261	0.609	0.856	0.471	1.555