Utility of SIFT-MS to evaluate volatile organic compounds in nephropathic patients' breath.

The ROC curve of TMA shows that the test is inaccurate (AUC = 0.687) but highly significant ( p value < 0.011) and the Youden's index (true positives–false positives) of TMA defines the best cut-off of 0 (true positive), 0 (false positive) and TMA values equal or over 131 ppbv.

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