TABLE 3.

Comparison of antioxidant intakes from dietary supplements only from the antioxidant questionnaire and a dietary supplement inventory among whites and African Americans in North Carolina (n=164)

Supplement Use a (per day)	Distributions (%) of non-usersb in whites (n=81)		Distributions (%) of non-usersb in African Americans (n=83)		Spearman’s correlations (p value) between the questionnaire and the supplement inventory f
	FFQ†	Supplement Inventory c	FFQ	Supplement Inventory c	Whites (n=81)	African Americans (n=83)
Vitamin A (IU) d	64	63	73	70	0.81 (<0.0001)	0.83 (<0.0001)
Beta-carotene (IU) d	75	63	81	70	0.33 (0.003)	0.66 (<0.0001)
Vitamin C (mg)	60	56	72	67	0.79 (<0.0001)	0.80 (<0.0001)
Vitamin E (IU) e	60	57	73	70	0.81 (<0.0001)	0.84 (<0.0001)

^aIncludes intakes from multivitamins and single supplements

^bAverage current daily supplemental intake from the FFQ computed as: days per week × dose per day/7 (days)

^cAverage current daily supplemental intake from supplement inventory calculated as: frequency of use × number of pills taken each time × dose per pill/7 (days)

^d1 IU vitamin A = 0.3 mcg retinol and 0.6 mcg β-carotene

^e1 IU vitamin E = 0.45 mg α-tocopherol

^fAdjusted for age, sex, race, education, body mass index, and, except for Vitamin C, total plasma cholesterol.