Table 1.

Regression PERMANOVA using four metrics to evaluate the β-diversity and identify microbiota shaping variables using a stepwise regression through manual backward elimination. The symbols indicate the p-value threshold (‘’*”: p-value ≤ 0.05, “**”: p-value ≤ 0.01 and “***”: p-value ≤ 0.001).

	Bray–Curtis	Unweighted Unifrac	Weighted Unifrac	Canberra
IBD	0.0001 ***	0.0001 ***	0.0001 ***	0.0001 ***
Age	0.0473 *			0.0265 *
Gender	0.0399 *		0.0052 **
Bread		0.0304 *
Yogurt				0.0367 *
Dairy products				0.0178 *