Table 4. Univariate ROC curves analysis.
| HS vs AD | AD vs SMC | ||||||
|---|---|---|---|---|---|---|---|
| Elements | AUC | T-tests | Statistical Power (%) | Elements | AUC | T-tests | Statistical Power (%) |
| Mn/V | 0.94044 | 4.78E-13 | 100 | Mn/Ni | 0.93137 | 2.08E-08 | 100 |
| Cu/Mn | 0.93456 | 8.87E-13 | 95 | Cu/Mn | 0.91422 | 4.44E-08 | 91 |
| Mn/Sr | 0.91838 | 1.18E-11 | 100 | Mn/V | 0.91176 | 3.63E-08 | 100 |
| Mn/U | 0.91691 | 4.72E-10 | 100 | Ca/Mn | 0.90074 | 1.78E-07 | 87 |
| Ca/Mn | 0.90882 | 7.58E-11 | 91 | Co/Mn | 0.89216 | 4.34E-07 | 91 |
| Mn | 0.89265 | 1.63E-10 | 100 | Mn | 0.89583 | 8.33E-08 | 100 |
| V | 0.82978 | 2.50E-07 | 94 | Hg | 0.80515 | 5.59E-05 | 91 |
| Hg | 0.77206 | 4.17E-05 | 88 | Zn | 0.78064 | 1.41E-04 | 96 |
| Se | 0.71618 | 2.35E-04 | 85 | Se | 0.77145 | 2.78E-04 | 91 |
| Mo | 0.70588 | 0.0018186 | 93 | V | 0.73897 | 0.0017877 | 84 |
| Zn | 0.70588 | 7.71E-04 | 71 | Fe | 0.73652 | 0.0045145 | 79 |
| U | 0.70515 | 4.98E-04 | 87 | ||||
| HS vs SMC | AD vs MCI | ||||||
| Elements | AUC | T-tests | Statistical Power (%) | Elements | AUC | T-tests | Statistical Power (%) |
| Sb/V | 0.70781 | 0.0056067 | 88 | Mn/Ni | 0.77059 | 8.45E-04 | 94 |
| Cu | 0.70417 | 0.01083 | 83 | Hg | 0.74706 | 0.0035936 | 83 |
| HS vs MCI | MCI vs SMC | ||||||
| Elements | AUC | T-tests | Statistical Power (%) | Elements | AUC | T-tests | Statistical Power (%) |
| Mn/V | 0.885 | 1.30E-09 | 100 | Mn/V | 0.85417 | 3.83E-06 | 100 |
| Se/V | 0.87375 | 3.74E-09 | 100 | Se/V | 0.82083 | 7.29E-05 | 100 |
| V/Zn | 0.8725 | 7.31E-09 | 97 | V/Zn | 0.81667 | 2.28E-05 | 93 |
| Mn/Mo | 0.85125 | 1.92E-06 | 100 | Mn | 0.80417 | 2.12E-04 | 96 |
| Sb/V | 0.84125 | 6.16E-07 | 100 | Se | 0.79271 | 3.99E-04 | 99 |
| V | 0.80875 | 7.62E-06 | 99 | Zn | 0.7375 | 0.0060502 | 90 |
| Mn | 0.78 | 1.86E-05 | 84 | V | 0.72917 | 0.0065436 | 94 |
| Se | 0.7475 | 0.0013699 | 98 | ||||
| Mo | 0.7225 | 0.013149 | 75 | ||||