Table 5. The ORs for breast cancer prevalence by education level.

	Model 1a	Model 2b	Model 3c
	OR(95%CI)	OR (95%CI)	OR(95%CI)
Education (year)
7-9/≤6	1.92 (1.11–3.32)	1.64 (0.94–2.86)	1.58 (0.88–2.83)
10-12/≤6	2.32 (1.32–4.09)	1.96 (1.10–3.50)	1.86 (1.03–3.38)
≥13/≤6	2.87 (1.44–5.70)	2.36 (1.16–4.80)	2.22 (1.06–4.65)

^aAdjusted by age and survey year

^bAdjusted by Model 1 variables plus waist circumference, marital status, residential area, current smoking status, alcohol intake in the past month, physical activity, cancer examination during the past 2 years, previous pregnancy, current or past use of oral contraceptives, post-menopausal status, and age at menarche

^cAdjusted by Model 2 variables plus monthly household income