TABLE 2.
Median Infant Diet Quality Index scores for children (7-12 mo) in the Special Supplemental Nutrition Program for Women, Infants and Children Infant Toddler Feeding Practices Study-2 (unweighted n = 2858, weighted N = 392,439)
| Index component | Scoring1 |
Results |
|||
|---|---|---|---|---|---|
| Criteria for minimum score (variable) | Criteria for maximum score (1) | Minimum score, weighted N (%) | Maximum score, weighted N (%) | Median (Q1, Q3) (range 0-1) | |
| Breastfeeding duration | Never breastfed | Breastfed for 12 mo or longer | 63721 (16.3) | 71268 (18.3) | 0.17 (0.02, 0.67) |
| Exclusive breastfeeding | Introduced formula at birth | Introduced formula at age 7 mo or later | 21318 (5.7) | 14487 (3.8) | 0.14 (0.02, 0.93) |
| Age of first introduction of solids | Introduced at birth or after 12 mo | Introduced between 6 and 7 mo | 34809 (9.0) | 11459 (3.0) | 0.39 (0.20, 1.00) |
| Age of first introduction of iron-rich cereals | Introduced at birth or after 12 mo | Introduced between 6 and 7 mo | 8524 (2.3) | 135682 (36.2) | 0.64 (0.36, 1.00) |
| Age of first introduction of cow milk | Introduced before 12 mo | Introduced at 12 mo or later | 139159 (38.5) | 222171 (61.5) | 1.00 (0.00, 1.00) |
| Age of first introduction of sugar-sweetened beverages | Introduced before 12 mo | Introduced at 12 mo or later | 236264 (66.0) | 121709 (34.0) | 0.00 (0.00, 1.00) |
| Age of first introduction of salty or sweet snack | Introduced before 6 mo | Introduced at 12 mo or later | 95518 (25.6) | 43702 (11.7) | 0.25 (0.03, 1.00) |
| Age of first introduction of other drinks or liquids | Introduced before 6 mo | Introduced at 12 mo or later | 51905 (15.2) | 213792 (62.4) | 1.00 (0.25, 1.00) |
| Age of first introduction of textured foods | Not introduced by 9 mo | Introduced by 9 mo | 177611 (55.5) | 142440 (44.5) | 0.00 (0.00, 1.00) |
| Frequency of consuming fruit2 | Consumed none at 9 mo | Consumed 2 or more times in a day at 9 mo | 61093 (16.6) | 175093 (47.4) | 1.00 (0.50, 1.00) |
| Frequency of consuming vegetables2 | Consumed none at 9 mo | Consumed 2 or more times in a day at 9 mo | 83999 (22.8) | 136726 (37.0) | 0.50 (0.50, 1.00) |
| Frequency of consuming different fruits2 | Consumed none at 9 mo | Consumed 2 or more types at 9 mo | 80925 (21.9) | 36772 (10.0) | 0.50 (0.50, 0.50) |
| Frequency of consuming different vegetables2 | Consumed none at 9 mo | Consumed 4 or more types at 9 mo | 84151 (22.8) | 5703 (1.5) | 0.30 (0.30, 0.60) |
| Exposure to nonrecommended bottle-feeding practices | 2 or more exposures by 7 mo of age | 0 exposures by 7 mo of age | 25383 (6.9) | 245269 (67.0) | 1.00 (0.50, 1.00) |
| Use of commercial baby food | Used for 5 or more food types | Never used | 70186 (21.9) | 42243 (13.2) | 0.40 (0.20, 1.00) |
| Number of meals or snacks2 | 0 or 1 in a day | 5 or more in a day | 18369 (5.0) | 161575 (43.8) | 0.75 (0.75, 1.00) |
Values are median (Q1, Q3) or frequency (%)
1
Utility functions were used to derive a unit-free component score (range, 0–1). The function selected achieved scores for each of the 16 components that were bounded between a minimum score (variable) (indicating poor adherence to guideline) and 1 (indicating adherence with guideline). See Supplemental Table 1 for formulae.
2
Derived from one 24-h dietary recall at 9 mo. All other components derived from surveys repeated over time.