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Table 2 Summary statistics used in tests of demographic neutrality and tree balance

From: Phylodynamic reconstruction of the spatiotemporal transmission and demographic history of coxsackievirus B2

Gene region

Statistical measures

Mean

Median

95 % HPDa

VP1

D b

-2.9149

-2.933

-3.5863, -2.1837

 

B 1 c

24.9094

24.9591

22.9639, 26.9044

 

Cn d

15.7291

16

14, 18

 

Ic d

0.1969

0.1902

0.1682, 0.2384

3D

D

-2.1294

-2.1457

-2.818, -1.4114

 

B 1

16.7549

16.6385

15.5468, 18.0199

 

Cn

11.0685

11

10, 12

 

Ic

0.238

0.2386

0.1875, 0.2822

  1. aHPD Highest posterior density
  2. b D Fu and Li’s D: Normalized difference between the external branch lengths and total tree length. This is a classic summary statistic used for testing neutrality
  3. c B 1 Maximum number of nodes between an internal node and the tips of the tree. A larger value indicates a more balanced tree
  4. d Cn Cherry count, the number of internal nodes with exactly two terminal branches. A larger number indicates a more balanced tree
  5. e Ic Colless’s tree imbalance index with a range of [0, 1]. A larger number indicates a more imbalanced tree