TABLE 1.
Comparison of antioxidant nutrient intakes from the antioxidant nutrient questionnaire and mean of four 24-hour dietary recalls among whites and African Americans in North Carolina (n=164) a
| Whites (n=81) |
African Americans (n=83) |
|||||
|---|---|---|---|---|---|---|
| Nutrient Intakes (per day) |
Median (25th–75th percentile) |
Median (25th–75th percentile) |
||||
| FFQ | Dietary recalls b | Biomarkers | FFQ | Dietary recalls | Biomarkers | |
| Dietary alpha-carotene (μg) | 3625 | 2937 | 0.190 | 2865 | 2151 | 0.133 |
| Plasma beta-carotene (μmol/L) | (2168–6168) | (1708–4488) | (0.131–0.302) | (1267–5490) | (988, 4072) | (0.094–0.233) |
| Dietary alpha-carotene (μg) | 617 | 305 | 0.051 | 242 | 175 | 0.031 |
| Plasma alpha-carotene (μmol/L) | (296–976) | (122–718) | (0.028–0.085) | (96–714) | (70, 419) | (0.019–0.046) |
| Dietary beta-cryptoxanthin (μg) | 194 | 164 | 0.091 | 125 | 140 | 0.094 |
| Plasma beta-cryptoxanthin (μmol/L) | (85–327) | (76–294) | (0.062–0.119) | (68–379) | (39–297) | (0.058–0.135) |
| Dietary lutein + zeaxanthin (μg) | 3034 | 2411 | 0.128 | 1936 | 1631 | 0.114 |
| Plasma lutein + zeaxanthin (μmol/L) | (1607–4843) | (1201–3694) | (0.096–0.166) | (1057–3982) | (934–2907) | (0.089–0.141) |
| Dietary lycopene (μg) | 4343 | 4890 | 0.392 | 3970 | 3241 | 0.402 |
| Plasma lycopene (μmol/L) | (2986–7654) | (2868–10446) | (0.295–0.476) | (2258–7916) | (1219–6129) | (0.311–0.549) |
| Dietary total alpha-tocopherol (mg) | 12.8 | 9.7 | 9.7 | 7.6 | 6.9 | 7.4 |
| Plasma alpha-tocopherol (μmol/L) | (7.3–17.8) | (6.5, 13.6) | (8.0, 11.7) | (3.8, 12.5) | (5.1, 9.3) | (6.0–9.0) |
| Dietary vitamin C (mg) | 145 | 105 | 9.06 | 110 | 90 | 8.19 |
| Plasma vitamin C (μmol/L) | (86–202) | (73–158) | (7.01–9.87) | (58–217) | (54–135) | (6.59–9.69) |
a
Whites (n=81) and African Americans (n=83)
b
Mean of four dietary recalls