Table 2. Comparisons of microbial community composition between the five health status groups.

Groups	t	P(perm)	P (FDR)*
ANGH vs ANG	1.68	0.003	0.005
ANGH vs NH	1.08	0.245	0.245
ANGH vs N	1.71	0.004	0.006
ANGH vs C	1.79	0.001	0.002
ANG vs NH	1.91	0.001	0.002
ANG vs N	1.22	0.08	0.089
ANG vs C	2.88	0.001	0.002
NH vs N	1.6	0.011	0.014
NH vs C	1.8	0.001	0.002
N vs C	2.86	0.001	0.002

Tests were performed with PERMANOVA using Bray-Curtis dissimilarity measures of OTU abundances (results from the 97% identity cutoff are shown here). The Pseudo-F statistic comparing all five groups is 3.56 with a permutation test P value of 0.001. The groups are defined as ANGH: Acute Necrotizing Gingivitis healthy site, ANG: Acute Necrotizing Gingivitis lesion site, C: Control, NH: Noma Healthy site, N: Noma lesion site. *P-values corrected for multiple comparisons using the False Discovery Rate. [42].