Table 1.

Characteristics of Women from the EPIC Study by Education.

	All	Education
		Primary		Vocational secondary		Other secondary		University or post-secondary vocational
	N	N	%	N	%	N	%	N	%
All women	242,095	83,303	34	68,872	29	41,905	17	48,015	20
Invasive breast cancers	4,469	1,523	34	1,381	31	727	16	838	19
In situ breast cancers	433	139	32	107	25	70	16	117	27
Parous women	201,668	76,103	38	58,808	29	33,414	17	33,343	16
Invasive breast cancers	3,805	1,356	36	1,186	31	613	16	650	17
In situ breast cancers	370	128	35	95	26	61	16	86	23
Nulliparous women	40,427	7,200	18	10,064	25	8,491	21	14,672	36
Invasive breast cancers	664	167	25	195	30	114	17	188	28
In situ breast cancers	63	11	18	12	19	9	14	31	49
Premenopausal womena	90,244	21,060	23	24,157	27	19,191	21	25,836	29
Invasive breast cancers	1,067	276	26	272	25	230	22	289	27
In situ breast cancers	110	23	21	27	25	20	18	40	36
Postmenopausal womena	102,721	43,319	45	28,959	28	13,852	14	13,591	13
Invasive breast cancers	2,389	947	40	756	32	323	13	363	15
In situ breast cancers	230	93	40	54	23	38	17	45	20

^aSome women are perimenopaused or have surgical menopause.