Nutrient-wide association study of 92 foods and nutrients and breast cancer risk

Breast Cancer Research

Table 2 Distribution of baseline demographic characteristics and covariates in the Netherlands Cohort Study

		Non-case		Case
		n	%	n	%
	Total	1608	100	2368	100
Age at recruitment (years)	[55, 60)	628	39	898	38
	[60, 65)	544	34	869	37
	[65, 69]	436	27	601	25
Smoking status	Never	927	58	1306	55
	Former	339	21	552	23
	Current	342	21	510	22
Education	Primary school	516	32	701	30
	Lower vocational school	364	23	506	21
	Secondary, medium vocational school	573	36	923	39
	Higher vocational, university degree	155	10	238	10
BMI (kg/m²)	[14.5, 20)	81	5	77	3
	[20, 23)	377	23	511	22
	[23, 25)	457	28	633	27
	[25, 30)	555	35	931	39
	[30, 35)	118	7	181	8
	[35, 44.3]	20	1	35	1
Physical activity (non-occupational, min/day)	[0, 30]	358	22	622	26
	(30, 60]	521	32	773	33
	(60, 90]	378	24	510	22
	(90, 415]	351	22	463	20
Diabetes	Yes	57	4	74	3
Parous	Yes	292	18	479	20
Family history of breast cancer (mother/sister(s))	Yes	139	9	348	15

ISSN: 1465-542X