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Table 8 Eigenvalue and cumulative variance of principal components (PCs)

From: Assessment of technological level of stem cell research using principal component analysis

PCs

Eigenvalue

Variance (%)

Cumulative variance (%)

PC1

2.15

53.62

53.62

PC2

1.03

25.70

79.33

PC3

0.62

15.42

94.75

PC4

0.21

5.25

100.00

  1. PC1 and PC2 were selected as their eigenvalues are higher than 1