Table 2.

α-diversity indices comparing STC patients to healthy subjects.

α-diversity index	Healthy Subjects	STC Patients	p-value
Shannon	6.351 ± 1.466	6.988 ± 1.425	0.094
Simpson	0.907 ± 0.082	0.942 ± 0.072	0.021
Ace	7,978.602 ± 3,979.623	9,247.546 ± 5,687.232	0.622
Goods coverage	0.974 ± 0.015	0.971 ± 0.0180	0.719
Chao1	7,766.749 ± 3,659.184	8,970.217 ± 5,284.232	0.602
Observed species	3,691.433 ± 1,705.291	4,347.967 ± 2,474.777	0.432
PD whole tree	99.107 ± 26.547	107.228 ± 36.495	0.676

Shannon index was tested by t-test, and the others were tested by Wilcoxon rank-sum test.