TABLE 1.

Age-standardized baseline characteristics of women in 1991 according to category of fish intake¹

	Fish intake (servings)
Characteristic	<1/mo (n = 4832)	1–3/mo (n = 9017)	1/wk (n = 39,841)	2–4/wk (n = 9292)	≥5/wk (n = 2233)
Age (y)2	36.0 ± 4.8	36.2 ± 4.7	36.2 ± 4.6	36.5 ± 4.5	36.7 ± 4.5
BMI (kg/m2)	24.3 ± 5.3	24.3 ± 5.2	24.4 ± 5.0	24.9 ± 5.4	25.2 ± 5.6
Waist circumference (1993) (cm)	78.1 ± 13.0	77.9 ± 12.6	77.7 ± 12.3	78.6 ± 13.0	78.2 ± 12.9
Physical activity (METs3)	18.1 ± 25.5	17.8 ± 23.9	20.3 ± 25.5	24.3 ± 29.1	30.6 ± 37.2
Smoking status (%)
Never	70.1	69.7	66.5	63.7	62.0
Past	19.2	19.9	22.3	25.3	25.7
Current	10.5	10.4	10.9	10.9	12.1
Alcohol (g/d)	2.2 ± 5.7	2.4 ± 5.4	3.3 ± 6.1	3.7 ± 6.5	4.0 ± 6.8
Vitamin B-12 intake (μg/d)	8.8 ± 12.6	9.1 ± 11.2	9.5 ± 10.8	10.5 ± 10.6	13.1 ± 28.4
Folate intake (μg/d)	476 ± 320	470 ± 312	474 ± 285	496 ± 275	520 ± 261
Potassium intake (mg/d)	2766 ± 595	2784 ± 526	2931 ± 498	3123 ± 518	3362 ± 585
Magnesium intake (mg/d)	301 ± 87	297 ± 74	314 ± 69	340 ± 71	370 ± 79
Retinol activity equivalents intake (μg/d)	1571 ± 1569	1563 ± 1440	1576 ± 1298	1662 ± 1292	1819 ± 1469
History of hypertension (%)	6.6	5.9	5.5	7.4	8.3
History of diabetes (%)	0.7	0.8	0.8	0.7	1.0
History of tinnitus (%)	9.8	9.5	8.4	8.4	7.2
White race (%)	93.9	94.1	94.2	93.5	89.4
Aspirin use ≥2 d/wk (%)	4.4	4.3	4.3	4.3	4.3
Ibuprofen use ≥2 d/wk (1995) (%)	9.9	9.0	9.0	9.5	9.9
Acetaminophen use ≥2 d/wk (1995) (%)	7.3	7.5	7.4	7.5	8.0

¹Values are means ± SDs unless otherwise indicated and are standardized to the age distribution of the study population. Values of polytomous variables may not sum to 100% because of rounding.

²Value is not age adjusted.

³METs, metabolic equivalents from recreational and leisure-time activities.