Table 2.

The five clinical trials of cfDNA in transplantation downloaded from ClinicalTrials.gov database (https://clinicaltrials.gov/) with terminated, completed, and active, not recruiting status.

NCT Number	Title	Condition	Actual Enrolment	Recruitment Status	Location	Age of Participants 1
NCT03765203	Utility of a Novel Dd-cfDNA Test to Detect Injury in Renal Post-Transplant Patients (QIDNEY)	Kidney transplant failure	175 participants	Completed	United States	Child, adult, older adult
NCT04271267	Cell-free DNA as a Biomarker After Lung Transplantation	Lung transplant rejection	126 participants	Completed	No data	Adult, older adult
NCT02424227	Non Invasive Blood Test To Diagnose Acute Rejection After Kidney Transplantation (DART)	Kidney transplant recipients	401 participants	Active, not recruiting	United States	Adult, older adult
NCT01985412	Genome Transplant Dynamics: Non-invasive Sequencing-based Diagnosis of Rejection (GTD)	Cardiac transplant rejection; lung transplant rejection	65 participants	Completed	United States	Child, adult
NCT02109575	Quantitative Detection of Circulating Donor-Specific DNA in Organ Transplant Recipients (DTRT-Multi-Center Study) (DTRT)	Cardiovascular disease; acute rejection of cardiac transplant; cardiac transplant rejection; heart transplant failure and rejection	no data	Active, not recruiting	United States	Child, adult, older adult

¹ Child: new-born to 17 years old; adult: 18–64 years old; older adult: more than 65 years old.