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Principal component analysis depicting the eigen values and variation percentages under exposure indicator.
| PC1 | PC2 | PC3 | PC4 | |
|---|---|---|---|---|
| Eigen values (R) | 2.90 | 2.15 | 1.52 | 1.29 |
| Proportion of variance (%) | 28.32 | 21.53 | 15.26 | 12.96 |
| Cumulative variance (%) | 28.32 | 49.86 | 65.12 | 78.09 |
