TABLE 6.

Relative abundance of bacteria genera in stool samples of participants at baseline (week 2) and follow-up (week 8)¹

	RG group				WG group
Phylum	Baseline	Follow-up	ΔRG	P	Baseline	Follow-up	ΔWG	P	ΔWG − ΔRG	P
Lachnospira, % of total microbiota	2.16 ± 0.37	1.31 ± 0.26	−0.85 ± 0.31	0.99	1.71 ± 0.26	1.90 ± 0.41	0.19 ± 0.34	1.00	1.04 ± 0.33	0.25
Roseburia, % of total microbiota	1.88 ± 0.29	1.48 ± 0.19	−0.40 ± 0.24	0.99	1.89 ± 0.38	2.81 ± 0.46	0.92 ± 0.42	1.00	1.32 ± 0.33	0.30
Enterobacteriaceae, % of total microbiota	0.05 ± 0.02	0.09 ± 0.04	0.04 ± 0.03	0.99	0.33 ± 0.17	0.30 ± 0.20	−0.03 ± 0.19	1.00	−0.07 ± 0.11	0.25

¹All values are means ± SEMs. n = 40 in the RG group, and n = 39 in the WG group. There were no differences between groups at baseline. P values were obtained with the use of a linear model; covariates in the model included age, BMI, and sex with false-discovery rate correction for multiple testing. RG, refined grain; WG, whole grain.