Table 2 Principal component analysis (PCA)
Component | Total variance explained | |||||
|---|---|---|---|---|---|---|
Initial eigenvalues | Extraction sums of squared loadings | |||||
Total | % of Variance | Cumulative % | Total | % of Variance | Cumulative  % | |
1 | 7.007 | 29.197 | 29.197 | 7.007 | 29.197 | 29.197 |
2 | 3.178 | 13.242 | 42.439 | 3.178 | 13.242 | 42.439 |
3 | 2.037 | 8.488 | 50.927 | 2.037 | 8.488 | 50.927 |
4 | 1.963 | 8.178 | 59.105 | 1.963 | 8.178 | 59.105 |
5 | 1.414 | 5.891 | 64.996 | 1.414 | 5.891 | 64.996 |
6 | 1.267 | 5.281 | 70.277 | 1.267 | 5.281 | 70.277 |
7 | 1.013 | 4.219 | 74.496 | 1.013 | 4.219 | 74.496 |