| Chosen parameter(s) | TE concentration or their combinations | Upper limit for PCa | Sensitivity % | Specificity % | Accuracy % |
| “Sensitivity” was chosen as 100% |
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| Rb | 1.39 mg/L | 100 | 49 ± 6 | 55 ± 5 |
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| Zn | 371 mg/L | 100 | 60 ± 5 | 66 ± 5 |
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| Zn/Br | 68.3 | 100 | 78 ± 5 | 80 ± 4 |
|
| Zn/Fe | 13.1 | 100 | 90 ± 3 | 91 ± 3 |
|
| Zn/Sr | 163 | 100 | 80 ± 6 | 83 ± 5 |
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| ZnRb | 115 | 100 | 89 ± 4 | 90 ± 3 |
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| (ZnRb)/Fe | 5.5 | 100 | 96 ± 2 | 96 ± 2 |
| “Specificity” was chosen as 100% |
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| Rb | 0.20 mg/L | 17 ± 11 | 100 | 89 ± 3 |
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| Zn | 45.0 mg/L | 63 ± 10 | 100 | 94 ± 2 |
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| Zn/Br | 10.5 | 70 ± 15 | 100 | 90 ± 3 |
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| Zn/Fe | 2.8 | 73 ± 14 | 100 | 90 ± 3 |
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| Zn/Sr | 34 | 75 ± 16 | 100 | 96 ± 3 |
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| ZnRb | 37 | 83 ± 11 | 100 | 98 ± 2 |
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| (ZnRb)/Fe | 0.90 | 73 ± 14 | 100 | 96 ± 2 |