Table 2.

Alpha diversity at the genus and species levels.

Taxonomic rank	Genus							Species
Indices	Good’s coverage	Richness	Chao1	ACE	Pielou	Shannon	Simpson	Good’s coverage	Richness	Chao1	ACE	Pielou	Shannon	Simpson
pSS patients
Mean	1.00	72.75	89.97	91.94	0.47	2.87	0.76	1.00	202.13	255.40	259.57	0.60	4.58	0.92
SD	0.00	28.16	55.81	58.58	0.08	0.45	0.06	0.00	64.76	136.36	151.47	0.07	0.58	0.03
Healthy controls
Mean	1.00	69.75	82.60	84.38	0.50	3.03	0.76	1.00	203.13	245.83	237.96	0.62	4.72	0.91
SD	0.00	16.02	24.10	25.04	0.08	0.51	0.08	0.00	43.54	65.07	61.56	0.06	0.52	0.05
p Value	0.874	0.741	0.652	0.658	0.419	0.451	0.987	0.989	0.964	0.816	0.621	0.575	0.546	0.756

pSS primary Sjögren’s syndrome.