TABLE 3.

Fiber intake at baseline and 6-mo follow-up and changes from baseline for each diet prescription, for adults with overweight or obesity who provided complete dietary recalls¹

Diet type	n	Baseline	6-mo follow-up	Change from baseline2	P value3	Effect size4
Low-fat, high-protein5	87	16.6 ± 5.8	20.1 ± 7.6	3.4 ± 7.9a,b	0.0001	0.586
Low-fat, average-protein6	86	17.7 ± 6.9	24.8 ± 9.4	7.0 ± 9.4a	<0.0001	1.014
High-fat, average-protein7	89	16.8 ± 5.9	19.0 ± 8.2	2.1 ± 8.1b	0.0141	0.356
High-fat, high-protein8	83	18.6 ± 6.7	20.7 ± 7.2	2.1 ± 6.5b	0.0036	0.3134

¹Values are means ± SDs, n = 345.

²ANOVA identified a significant difference in change in fiber intake from baseline across diet groups (P < 0.001). Labeled means in a column without a common letter indicate pairwise differences in fiber change from baseline between diet groups after Bonferroni adjustment (P < 0.01).

³The P values correspond to the difference in means from baseline to 6-mo follow-up.

⁴Effect size represents the standardized difference between means from baseline to 6-mo follow-up and was estimated using Cohen's d.

⁵Low-fat, high-protein: 20% fat, 25% protein.

⁶Low-fat, average-protein: 20% fat, 15% protein.

⁷High-fat, average-protein: 40% fat, 15% protein.

⁸High-fat, high-protein: 40% fat, 25% protein.