Table 1 Statistics of CAP and PERMANOVA for discrimination of gut microbiota structure between the rural and urban cohorts with identical ethnicities and geographical regions on the basis of the unweighted UniFrac distance

From: A phylo-functional core of gut microbiota in healthy young Chinese cohorts across lifestyles, geography and ethnicities

Cohorts

Sample size (rural/urban, n/n)

Optimal dimensionality (m) of the principal coordinates (FULL/CORE)

Variations explained (%, FULL/CORE)

Correct classification rates (%, FULL/CORE)

P-values (FULL/CORE)

     

CAP

PERMANOVA

Han (Zhengzhou)

12/11

11/15

67.34/82.96

73.91/86.96

0.0036/0.0316

0.0449/0.0366

Han (Harbin)

14/16

23/27

87.21/96.77

66.67/63.33

0.1872/0.1990

0.0372/0.2086

Han (Wuxi)

9/12

15/15

82.43/84.20

61.91/66.67

0.2768/0.6092

0.1499/0.1307

Han (Chengdu)

9/8

15/9

95.68/68.49

23.53/29.41

0.9391/0.7830

0.9509/0.9258

Mongol

26/22

21/19

61.54/60.75

97.92/91.67

0.0001/0.0001

0.0001/0.0001

Zhuang

24/22

36/35

88.64/88.67

86.96/91.30

0.0005/0.0002

0.0001/0.0007

Tibetan

28/15

19/24

63.19/74.23

72.09/67.44

0.0353/0.2741

0.0565/0.0759

Bai

29/14

31/23

84.50/73.06

72.09/69.77

0.0617/0.1059

0.0737/0.0833

Uyghur

9/12

17/12

90.01/72.74

57.14/61.91

0.0870/0.3480

0.1659/0.1144

Kazakh

9/13

18/10

90.11/62.45

45.46/59.09

0.0783/0.6447

0.9074/0.8210

  1. Abbreviations: CAP, canonical analysis of principal coordinates; CORE, data derived from only the operational taxonomic units (OTUs) assigned to the nine core genera (that is, the core set of OTUs); FULL, data derived from the full set of OTUs; PERMANOVA, permutational multivariate analysis of variance. P-values represent the proportion of permuted differences greater than real differences.
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