Int. J. Environ. Res. Public Health 2012, 9 1375 Table 3. Block linear regression models of baseline child characteristics, treatment condition, baseline dietary variables, change in fruit and vegetable servings per day and change in snack food servings per day on change in energy intake. Model (block) Variables β p-values Age 0 −0.02 p = 0.89 1 (I) Sex −0.03 p = 0.84 Race 0.02 p = 0.87 Ethnicity −0.00 p = 0.98 BMI z-score 0 0.10 p = 0.45 R2 change = 0.012, p = 0.97; R2cum = 0.012; F (5, 74) = 0.19, p = 0.97 Age 0 −0.00 p = 0.95 2 (I & II) Sex −0.03 p = 0.80 Race −0.01 p = 0.91 Ethnicity 0.02 p = 0.87 BMI z-score 0 0.06 p = 0.67 Treatment Condition −0.17 p = 0.16 R2 change = 0.026, p = 0.16; R2cum = 0.039; F (6, 73) = 0.49, p = 0.82 Age 0 0.15 p = 0.15 3 (I, II & III) Sex −0.07 p = 0.51 Race −0.06 p = 0.55 Ethnicity 0.13 p = 0.21 BMI z-score 0 0.14 p = 0.22 Treatment Condition −0.16 p = 0.12 SF serving/day 0 −0.06 p = 0.61 FV servings/day 0 0.04 p = 0.72 Energy Intake 0 −0.61 p < 0.001 R2 change = 0.373, p < 0.001; R2cum = 0.412; F (9, 70) = 5.45, p < 0.001 4 (I, II, III & IV) Age 0 0.07 p = 0.44 Sex −0.14 p = 0.14 Race −0.07 p = 0.38 Ethnicity 0.03 p = 0.77 BMI z-score 0 0.12 p = 0.17 Treatment Condition −0.07 p = 0.38 SF serving/day 0 0.42 p < 0.05 FV servings/day 0 0.02 p = 0.84 Energy Intake 0 −0.64 p < 0.001 Change in FV serving/day 0.10 p = 0.23 Change in SF serving/day 0.63 p < 0.001 R2 change = 0.205, p < 0.001; R2cum = 0.617; F (11, 68) = 9.97, p < 0.001 0 baseline values; R2 change = incremental variance accounted for by each block; 2 R cum = variance accounted for by the entire model. 4. Discussion This investigation examined the relationship between changes in consumption of FVs and SFs in 80 overweight and obese children, 4- to 9-years-old, who were enrolled in a 6-month, family-based