Table 1.
Characteristics of NHANES I and NHANES III datasets.
| NHANES I (1971–1975) | NHANES III (1988–1994) | |
|---|---|---|
| Sample size | 20,195 | 28,663 |
| Age range | 1–74 y | 1–90 y |
| Individual food intake data | 353,664 | 430,050 |
| Number of individual foods | 3,462 | 7,096 |
| in the data set | ||
| Numbers of total sugar is | _ | 4,000 |
| greater than 0 in NHANES III | ||
| Numbers of added sugar is | _ | 2,226 |
| greater than 0 in NHANES III | ||
| Number of consumed foods | 1,823 | 4,732 |
| Number of non-matched foods | 12a | _ |
| Number of matched foods | 1,811 | _ |
| Nutrient variables in the dataset | energy, protein, fat, carbohydrate, saturated fatty acid, | energy, protein, fat, carbohydrate, saturated fatty acid, oleic acid, |
| oleic acid, linoleic acid, cholesterol, vitamin A, | linoleic acid, linolenic acid, monounsaturated fatty acid, polyunsaturated | |
| thiamin, riboflavin, niacin, vitamin C, calcium, | fatty acid, cholesterol, fiber, alcohol, vitamin A, retinol, β-carotene, | |
| Phosphorus, iron, sodium, potassium | tocopherol, thiamin, riboflavin, niacin, vitamin B6, vitamin B12, folate, | |
| vitamin C, calcium, phosphorus, manganese, iron, sodium, potassium, | ||
| glucose, fructose, galactose, sucrose, lactose, maltose, sugar, added sugar | ||
| Matched variables with NHANES III | sugar, added sugar, fiber, β-carotene, folate, | _ |
| food composition table | vitamin B6, vitamin B12 |
a 12 food items in the individual food consumption data file of NHANES I could not be matched, because these items were not described in the food description file of NHANES I.