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. 2018 Oct 1;13(10):e0204724. doi: 10.1371/journal.pone.0204724

Table 2. Mean alpha diversities of plaque and saliva samples at baseline as calculated using different alpha diversity metrics (n = 18).

		Plaque	Saliva	P-value ^a
Observed OTUs	Mean ± SD	165.72 ± 35.51	182.61 ± 46.27	0.025
Observed OTUs	Median (IQR)	165.00 (142.50; 195.00)	194.50 (142.50; 222.00)	0.025
Chao1	Mean ± SD	186.07 ± 38.01	202.02 ± 48.64	0.022
Chao1	Median (IQR)	180.02 (168.92; 213.80)	208.57 (157.89; 243.54)	0.022
Shannon	Mean ± SD	3.19 ± 0.62	3.41 ± 0.42	0.078
Shannon	Median (IQR)	3.38 (2.58; 3.71)	3.40 (3.16; 3.72)	0.078
Simpson	Mean ± SD	0.11 ± 0.08	0.07 ± 0.03	0.022
Simpson	Median (IQR)	0.09 (0.05; 0.19)	0.07 (0.05; 0.09)	0.022

IQR, Interquartile range

^a Wilcoxon test