Table 4.
Summary of regression output for Purpose Two (n = 328 fourth-grade children and 1,178 meals) with body mass index (BMI) as the dependent variable, and Pearson correlations for five of the six aspects of school-provided mealsa.
| Pearson correlationsb | ||||||
|---|---|---|---|---|---|---|
| Independent variables | Regression estimatec (p-value) | Amounts eaten of standardized school-meal portions | Energy content given in food trades | Energy intake received in food trades | Energy intake from flavored milk | Energy intake from a la carte ice cream |
| Amounts eaten of standardized school- meal portions | 2.9786 (<0.0001) | 1.00 | −0.15 | 0.42 | 0.07 | −0.15 |
| Energy content given in food trades | −0.0104 (0.0052) | -- | 1.00 | 0.12 | −0.08 | 0.08 |
| Energy intake received in food trades | −0.0143 (0.1366) | -- | -- | 1.00 | 0.04 | −0.14 |
| Energy intake from flavored milk | 0.0064 (0.5335) | -- | -- | -- | 1.00 | −0.18 |
| Energy intake from a la carte ice cream | −0.0177 (0.2937) | -- | -- | -- | -- | 1.00 |
| Breakfast type | −0.4326 (0.1529) | |||||
| Sexd | 1.0605 (0.0223) | |||||
| Racee | 1.8760 (0.0021) | |||||
| Age | 0.0523 (0.0669) | |||||
| Study | χ2 = 2.75 (0.4320) | |||||
The six aspects of school-provided meals are defined in Table 2 footnotes b through g. Daily energy intake at school-provided meals was analyzed in units of 100 kilocalories for ease of interpretation.
Pearson correlations assess bivariate relationships between any two of five meal aspects with breakfast type excluded because it is binary (hot, cold).
Regression estimates are in kg/m2. The level of significance assumed for each individual regression estimate is 0.05. A Bonferroni-adjusted level of significance is 0.005 (0.05/10).
Female children were coded as 1, and male children were coded as 0.
Black children were coded as 1, and White children were coded as 0.