Table 2

Table of eigenvalues and variance in the global Principal Component Analysis

Global PCs

Eigenvalue

Variance (%)

Total variance (%)

1

4.7602

43.99

43.99

2

1.655

15.29

59.28

3

1.0773

9.96

69.24

4

0.8069

7.46

76.7

5

0.7016

6.48

83.18

Damiani et al. BMC Health Services Research 2011 11:316   doi:10.1186/1472-6963-11-316