TABLE 2.

Characteristics of 12,044 premenopausal women by categories of dark-meat fish and other fish and seafood in the Black Women's Health Study, 2001¹

	Dark-meat fish (servings/wk)						Other fish and seafood (servings/wk)
	None	<0.3	0.3–0.6	0.7–0.9	≥1.0	P-trend	None	<0.9	0.9–1.6	1.7–2.5	≥2.6	P-trend
Women (n)	4643	753	2365	2139	2144	—	599	2865	2782	2872	2926	—
Age (y)	37.2 ± 0.62	38.3 ± 0.6	38.0 ± 0.6	38.2 ± 0.6	38.8 ± 0.6	<0.001	36.6 ± 0.6	37.4 ± 0.6	38.2 ± 0.6	38.0 ± 0.6	38.2 ± 0.6	<0.001
BMI (kg/m2)	29.6 ± 3.4	28.3 ± 3.1	29.2 ± 3.2	29.0 ± 3.2	28.6 ± 3.2	<0.001	28.3 ± 3.2	28.8 ± 3.2	29.2 ± 3.3	29.5 ± 3.4	29.4 ± 3.3	<0.001
Age at menarche (y)	12.3 ± 0.7	12.4 ± 0.7	12.3 ± 0.7	12.3 ± 0.7	12.4 ± 0.7	0.98	12.2 ± 0.7	12.3 ± 0.7	12.3 ± 0.7	12.3 ± 0.7	12.4 ± 0.7	0.04
Ever parous (%)	62	65	61	62	57	0.006	54	63	63	62	59	0.02
Recent pelvic examination in 2007 (%)	90	87	90	90	92	0.008	89	90	90	90	91	0.22
Age at first OC3 use (y)	19.2 ± 1.7	19.2 ± 1.6	19.3 ± 1.7	19.1 ± 1.7	19.4 ± 1.8	0.26	19.7 ± 1.8	19.3 ± 1.8	19.3 ± 1.7	19.1 ± 1.7	19.2 ± 1.8	0.001
Current smoker (%)	11	13	12	13	11	0.48	8	11	12	11	13	<0.001
Alcohol intake (drinks/wk)	1.3 ± 1.3	1.6 ± 1.6	1.4 ± 1.3	1.5 ± 1.3	1.6 ± 1.4	<0.001	1.1 ± 1.2	1.2 ± 1.3	1.5 ± 1.4	1.5 ± 1.3	1.6 ± 1.4	<0.001
Energy intake (kcal/d)	1434 ± 305	1292 ± 273	1467 ± 298	1558 ± 291	1761 ± 316	<0.001	1306 ± 297	1254 ± 268	1392 ± 274	1553 ± 285	1884 ± 319	<0.001
Total dietary fat (g/d)	58.3 ± 14.0	52.4 ± 12.5	60.0 ± 13.7	63.5 ± 13.3	72.0 ± 14.7	<0.001	51.1 ± 13.0	50.1 ± 12.2	56.8 ± 12.6	63.7 ± 13.1	77.7 ± 15.0	<0.001
Total dietary saturated fat (g/d)	18.7 ± 4.8	16.8 ± 4.4	19.2 ± 4.7	20.1 ± 4.7	21.9 ± 4.9	<0.001	16.1 ± 4.4	16.1 ± 4.2	18.2 ± 4.4	20.3 ± 4.6	24.0 ± 5.1	<0.001
Dairy intake (servings/d)	0.9 ± 0.5	0.9 ± 0.6	1.0 ± 0.5	1.0 ± 0.5	1.1 ± 0.5	<0.001	0.8 ± 0.5	0.8 ± 0.4	0.9 ± 0.5	1.0 ± 0.5	1.1 ± 0.5	<0.001
Fruit and vegetable intake (servings/d)	1.8 ± 0.7	1.8 ± 0.7	2.0 ± 0.6	2.2 ± 0.6	2.8 ± 0.8	<0.001	2.1 ± 0.9	1.7 ± 0.7	1.8 ± 0.6	2.1 ± 0.6	2.7 ± 0.8	<0.001
Fast-food restaurant meals (≥18/mo) (%)	18	19	16	16	16	0.006	12	13	15	18	22	<0.001
Marine fatty acids (g/d)	0.13 ± 0.04	0.17 ± 0.04	0.20 ± 0.04	0.28 ± 0.04	0.48 ± 0.09	<0.001	0.06 ± 0.04	0.13 ± 0.04	0.19 ± 0.04	0.25 ± 0.05	0.39 ± 0.09	<0.001
Current use of fish-oil supplements (%)	0.6	0.6	0.9	1.1	1.2	0.008	0.2	0.5	1.0	1.1	1.0	0.009
Current use of flaxseed-oil supplements (%)	0.3	0.2	0.3	0.4	0.7	0.11	0.2	0.3	0.4	0.6	0.4	0.18
Marital status: married (%)	43	40	43	43	42	0.72	41	43	43	44	40	0.10
Educational attainment (y)	14.9 ± 0.8	14.7 ± 0.8	15.0 ± 0.8	15.1 ± 0.7	15.2 ± 0.7	<0.001	15.2 ± 0.7	15.0 ± 0.8	15.0 ± 0.8	15.0 ± 0.8	15.1 ± 0.7	0.25
Household income in 2003 (%)
≤$50,000	42	48	40	30	38	<0.001	37	43	42	41	40	0.18
$50,001–$100,000	42	37	40	38	41	0.13	43	41	39	40	41	0.65
>$100,000	16	15	20	22	21	<0.001	19	17	19	20	20	0.04
Region of residence in the United States (%)
South	35	38	35	33	34	0.19	30	33	35	36	36	0.003
Northeast	21	24	25	29	32	<0.001	23	24	25	24	29	<0.001
Midwest	25	20	22	21	17	<0.001	24	24	22	23	19	<0.001
West	19	18	18	17	17	0.001	23	19	18	17	16	<0.001

¹Characteristics were ascertained in 2001 unless otherwise noted. Values were standardized to the age distribution of the cohort in 2001. P values were determined from the age-adjusted test for linear trend across all quintiles.

²Mean ± SD (all such values).

³OC, oral contraceptive.