| RBTEI | WBTEI | NEF | PAI | NPF | |
| RBTEI | 1 | ||||
| WBTEI | 0.046 | 1 | |||
| NEF | 0.019 | −0.129 | 1 | ||
| PAI | 0.223* | 0.046 | 0 | 1 | |
| NPF | 0.143 | −0.065 | 0 | 0 | 1 |