TABLE 2.
Mean nutrient intakes and daily diet costs determined from an FFQ or the mean of three 24-h recalls (n = 121)1
| Variable | 24-h Recall | FFQ | P2 |
| Energy (kcal/d) | 1903 (1798, 2015) | 1986 (1806, 2183) | 0.330 |
| Total fat (g/d) | 79 (74, 85) | 80 (73, 89) | 0.778 |
| Carbohydrate (g/d) | 218 (203, 234) | 244 (220, 269) | 0.020 |
| Protein (g/d) | 75 (70, 79) | 70 (64, 77) | 0.165 |
| Cholesterol (mg/d) | 254.0 (232.7, 277.3) | 261.4 (232.2, 294.3) | 0.639 |
| Vitamin A (RE/d) | 722.7 (642.5, 812.8) | 810.6 (730.8, 899.1) | 0.102 |
| Vitamin C (mg/d) | 71.9 (63.1, 81.9) | 98.8 (86.9, 112.3) | <0.001 |
| Vitamin E (IU/d) | 12.6 (11.5, 13.8) | 13.3 (12.0, 14.7) | 0.393 |
| Niacin (mg/d) | 20.1 (18.8, 21.4) | 18.7 (17.0, 20.6) | 0.146 |
| Thiamine (mg/d) | 1.3 (1.3, 1.4) | 1.5 (1.4, 1.6) | 0.028 |
| Riboflavin (mg/d) | 1.6 (1.5, 1.7) | 2.1 (1.9, 2.3) | <0.001 |
| Vitamin B-6 (mg/d) | 1.6 (1.5, 1.7) | 1.8 (1.6, 2.0) | 0.009 |
| Vitamin B-12 (μg/d) | 3.4 (3.0, 3.8) | 5.6 (5.0, 6.2) | <0.001 |
| Folate (μg/d) | 237.5 (217.2, 259.8) | 255.7 (231.9, 281.9) | 0.153 |
| Calcium (mg/d) | 693.4 (636.9, 754.9) | 862.9 (778.2, 956.7) | <0.001 |
| Magnesium (mg/d) | 253.6 (237.6, 270.8) | 281.3 (257.0, 308.0) | 0.021 |
| Iron (mg/d) | 13.1 (12.2, 14.0) | 13.0 (11.8, 14.3) | 0.891 |
| Potassium (mg/d) | 2403 (2256, 2560) | 2811 (2570, 3074) | <0.001 |
| Sodium (mg/d) | 3205 (2996, 3428) | 3126 (2837, 3444) | 0.613 |
| Copper (mg/d) | 1.2 (1.1, 1.2) | 1.2 (1.1, 1.4) | 0.262 |
| Zinc (mg/d) | 10.0 (9.3, 10.7) | 10.8 (9.8, 11.8) | 0.103 |
| Diet cost ($/d) | 6.32 (5.88, 6.81) | 5.93 (5.42, 6.49) | 0.221 |
| Dietary energy cost ($/2000 kcal/d) | 6.65 (6.27, 7.04) | 5.98 (5.79, 6.17) | 0.001 |
1
All values are geometric means; 95% CIs in parentheses. FFQ, food-frequency questionnaire; RE, retinol equivalent.
2
Means were compared by paired t tests; P < 0.05 indicates a significant difference.