| LnIS3 | −14.45*** | 0.00 | −6.56*** | 0.00 | 1 | 
| LnIShigh | −9.26*** | 0.00 | −4.97*** | 0.00 | 1 | 
| LnECI | −6.80*** | 0.00 | −2.27*** | 0.01 | 1 | 
| LnIECI | −8.37*** | 0.00 | −2.69*** | 0.00 | 1 | 
| LnPEPI | −9.42*** | 0.00 | −5.39*** | 0.00 | 1 |