TABLE 1.

Age-standardized characteristics of the EPIC study and the NLCS¹

	EPIC	NLCS2
Participants, n	325,004	2216
Age at enrollment, y	50.1 ± 9.83	61.4 ± 4.3
Parous, %	85	82
Ever use of OCs, %	59	25
Postmenopausal, %	45	100
Children,4 n	2.3 ± 1.0	3.4 ± 2.0
Duration of OC use,5 y	7.8 ± 7.3	7.4 ± 5.4
BMI, kg/m2	24.9 ± 4.4	24.3 ± 5.8

¹All variables except age were age standardized in 5-y age groups according to the age distribution of the study population. EPIC, European Prospective Investigation into Cancer and Nutrition; NLCS, Netherlands Cohort Study; OC, oral contraceptive.

²Values refer to the NLCS subcohort.

³Mean ± SD (all such values).

⁴Among parous women.

⁵Among OC ever users.