Table 4.

The unadjusted and adjusted OR for breast cancer.

		Unadjusted OR		Adjusted OR
Variables	Category	OR (95%CI)	p-value	OR (95%CI)	p-value
Age of menopause	<50 (years)	ref	ref	ref	ref
	≥ 50 (years)	2.35 (1.57–3.50)	<0.001*	1.98 (1.18–3.35)	0.010*
Parity	Nulliparous	0.81 (0.07–9.45)	0.868	0.31 (0.01–6.63)	0.307
	Primiparous	ref	ref	ref	ref
	≥ Multiparous	1.78 (1.03–3.11)	0.039*	1.04 (0.47–2.31)	0.918
Breastfeeding	< 12 months	ref	ref	ref	ref
	≥ 12 months	27.12 (6.47–113.66)	<0.001*	19.94 (4.26–93.27)	<0.001*
High-fat diet	Normal	ref	ref	ref	ref
	High	30.55 (14.28–65.34)	<0.001	33.08 (14.85–73.71)	<0.001*
BMI	Normal	ref	ref	ref	ref
	Overweight	2.60 (1.43–4.73)	0.002*	3.33 (1.46–7.61)	0.004*
	Obesity	1.99 (1.28–3.11)	0.002*	2.53 (1.39–4.60)	<0.001*

OR, odd ratio; ref, reference.

^⁎, significant at p < 0.05.