TABLE 3.
Mean, prevalence of inadequate intake, and 25th, 50th, and 75th percentiles of usual vitamin A, magnesium, folate, and vitamin E intake among adult men in the United States as estimated by the NCI amount-only method and NCI 1-d method with NHANES 2011–2014 data1
| Vitamin A, µg RAE/d | Magnesium, mg/d | Folate, µg DFE/d | Vitamin E, mg/d | |||||
|---|---|---|---|---|---|---|---|---|
| Parameters | NCI amount-only | NCI 1-d | NCI amount-only | NCI 1-d | NCI amount-only | NCI 1-d | NCI amount-only | NCI 1-d |
| Mean | 708.0 (19.2) | 704.6 (21.8) | 351.3 (3.3) | 350.7 (3.5) | 628.7 (6.4) | 626.6 (6.4) | 10.3 (0.1) | 10.4 (0.1) |
| 25th percentile | 459.3 (11.7) | 460.6 (9.5) | 267.7 (2.6) | 266.4 (2.2) | 458.2 (7.6) | 455.5 (4.8) | 7.3 (0.1) | 7.3 (0.1) |
| 50th percentile | 647.4 (14.2) | 647.5 (17.3) | 337.6 (3.0) | 334.3 (2.9) | 594.9 (6.6) | 589.4 (6.1) | 9.7 (0.1) | 9.6 (0.1) |
| 75th percentile | 890.0 (25.0) | 885.7 (29.6) | 420.0 (4.4) | 417.2 (4.3) | 762.4 (7.9) | 757.5 (7.8) | 12.6 (0.2) | 12.7 (0.2) |
| Inadequate intake, % | 47.1 (1.8) | 47.1 (2.1) | 54.3 (1.1) | 55.5 (1.1) | 6.1 (0.8) | 6.0 (0.4) | 70.6 (1.2) | 70.6 (1.2) |
Values in parentheses are standard errors. n1 = 4938 and n2 = 4293 for the first and second 24-h recalls for the amount-only method and n = 4938 for the 1-d method. The ratio of within-person and between-person variance was calculated through use of the NCI amount-only method and used as an input in the NCI 1-d method. For all parameters, the estimates via each method are functionally identical for applied use as well as statistically significant by equivalence testing (P < 0.05). DFE, dietary folate equivalents; NCI, National Cancer Institute; NHANES, National Health and Nutrition Examination Survey; RAE, retinol activity equivalents.