Table 2.

ORs for the prevalence of hypertension in postmenopausal women according to past use of OC

Duration of OC use
	No. (n = 2713)	< 30 months (n = 489)		≥ 30 months (n = 184)
		OR (95%CI)	P value	OR (95%CI)	P value
Model 1	1 (ref)	1.10 (0.86–1.40)	0.457	2.18 (1.53–3.12)	< 0.001
Model 2	1 (ref)	1.04 (0.81–1.34)	0.746	2.11 (1.31–3.42)	0.002
Model 3	1 (ref)	1.05 (0.80–1.37)	0.166	1.75 (1.12–2.74)	0.021

Model 1: unadjusted; model 2: adjusted for age and BMI; model 3: adjusted for age, BMI, education level, household income, smoking status, alcohol consumption, physical activity, current medical status (DM and dyslipidemia), and reproductive factors (age at menopause and number of pregnancies)