Figure 4.

Alpha diversity indices for healthy-weight controls and patients with anorexia nervosa (AN), by weight gain status (before and after), at each sampling location. (a) Shannon diversity index. (b) Chao1 diversity index. Wilcoxon test (see “Methods” section); p-values: *< 0.05; **< 0.01; ***< 0.001. p-values were adjusted for multiple testing according to Benjamini and Hochberg⁹⁴. Line indicates the median concentration; box shows the interquartile range (IQR), and the whiskers are 1.5 × IQR. Blue represents healthy-weight controls, red represents patients with AN before weight gain, and gold represents patients with AN after weight gain.