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The QSant test is designed to quantitatively measure acute kidney transplant rejection using patient urine samples. The test measures six urinary biomarkers: cell-free DNA (cfDNA), methylated cfDNA (m-cfDNA), clusterin, CXCL10, creatinine, and total protein in renal transplant patients. The six-biomarker data are integrated into an algorithm to calculate a composite kidney rejection risk score, Q-Score, from a scale of 0–100 to reflect the probability of allograft rejection risk.
