| Primary | Percentage of Participants With Incremental IF/A Scores >2 at 24 Months Post-Randomization | The investigators were not able to assess this outcome, the effect of the intervention on interstitial fibrosis/tubular atrophy (IF/TA; on a 2-year graft biopsy) due to the study's premature termination by the Data Safety Monitoring Board (DSMB) because of absence of equipoise on the basis of predetermined stopping rules. | No analyses were performed due to early study closure. | Posted | | | | | | IF/TA scores on protocol biopsies obtained at 24 months post-randomization will be compared to those obtained at the time of implantation for this measurement. | | | | ID | Title | Description |
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| OG000 | Randomized to Tacrolimus Withdrawal | These participants were enrolled into the study and received a living-donor kidney allograft transplant. Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to tacrolimus withdrawal. Following randomization these participants had their dose of tacrolimus withdrawn gradually over three to four months, with complete withdrawal occurring no later than four months. Participants were followed up to 18 months after being randomized. | | OG001 | Randomized to Control Group | Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to control group, where the continued on the pre-randomization standard care of mycophenolate mofetil, prednisone, and tacrolimus. Participants were followed up to 18 months after being randomized. |
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| Secondary | Estimated GFR Using the Chronic Kidney Disease Epidemiology (CKD-EPI) Equation | Estimated glomerular filtration rate (eGFR) is a test to measure the level of kidney function. In this measure, the effects of tacrolimus withdrawal on long-term kidney function was assessed by comparing absolute 24 month eGFR (18 months post-randomization) and change in eGFR from 6 to 24 months (randomization to 18 months randomization). Lower numbers indicate poorer kidney function | | Posted | | Mean | Standard Deviation | mL/min | | 6 months post-transplantation, 24 months post-transplantation | | | | ID | Title | Description |
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| OG000 | Randomized to Tacrolimus Withdrawal | These participants were enrolled into the study and received a living-donor kidney allograft transplant. Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to tacrolimus withdrawal. Following randomization these participants had their dose of tacrolimus withdrawn gradually over three to four months, with complete withdrawal occurring no later than four months. Participants were followed up to 18 months after being randomized. | | OG001 | Randomized to Control Group |
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| Secondary | Incidence of Acute Rejection | Acute renal allograft rejection is defined as histological reading of borderline or greater determined by the local pathology laboratory. Participants suspected of having a rejection episode on the basis of clinical signs, symptoms, or on the basis of laboratory tests, had a renal ultrasound and underwent a renal transplant biopsy. Any detection of acute cellular rejection or acute humoral rejection resulted in participants in the 'Randomized to Tacrolimus Withdrawal' group to be restarted on tacrolimus and followed per the reduced follow-up schedule of events. | | Posted | | Number | | participants | | 6 to 18 months post-randomization | | | | ID | Title | Description |
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| OG000 | Randomized to Tacrolimus Withdrawal | These participants were enrolled into the study and received a living-donor kidney allograft transplant. Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to tacrolimus withdrawal. Following randomization these participants had their dose of tacrolimus withdrawn gradually over three to four months, with complete withdrawal occurring no later than four months. Participants were followed up to 18 months after being randomized. | | OG001 |
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| Secondary | Allograft Survival Rate | Allograft survival is defined as participants who did not need to be re-transplanted or placed on dialysis due to the failure of their allograft transplantation during the course of this study. | | Posted | | Number | | participants | | 6 to 18 months post-randomization | | | | ID | Title | Description |
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| OG000 | Randomized to Tacrolimus Withdrawal | These participants were enrolled into the study and received a living-donor kidney allograft transplant. Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to tacrolimus withdrawal. Following randomization these participants had their dose of tacrolimus withdrawn gradually over three to four months, with complete withdrawal occurring no later than four months. Participants were followed up to 18 months after being randomized. | | OG001 | Randomized to Control Group | Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to control group, where the continued on the pre-randomization standard care of mycophenolate mofetil, prednisone, and tacrolimus. Participants were followed up to 18 months after being randomized. |
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| Secondary | Participant Survival Rate | Number of participants who did not die within the course of this study. | | Posted | | Number | | participants | | 6 to 18 months post-transplantation | | | | ID | Title | Description |
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| OG000 | Randomized to Tacrolimus Withdrawal | These participants were enrolled into the study and received a living-donor kidney allograft transplant. Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to tacrolimus withdrawal. Following randomization these participants had their dose of tacrolimus withdrawn gradually over three to four months, with complete withdrawal occurring no later than four months. Participants were followed up to 18 months after being randomized. | | OG001 | Randomized to Control Group | Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to control group, where the continued on the pre-randomization standard care of mycophenolate mofetil, prednisone, and tacrolimus. Participants were followed up to 18 months after being randomized. |
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| Secondary | Percentage of Participants With New Donor Specific Antibodies (DSAs) | Donor specific antibodies are antibodies that are directed against antigens expressed on donor organs. These antibodies can result in an immune attack on the transplanted organ, increasing risk of graft loss and/or rejection. | | Posted | | Number | | percentage of participants | | 6 to 18 months post-randomization | | | | ID | Title | Description |
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| OG000 | Randomized to Tacrolimus Withdrawal | These participants were enrolled into the study and received a living-donor kidney allograft transplant. Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to tacrolimus withdrawal. Following randomization these participants had their dose of tacrolimus withdrawn gradually over three to four months, with complete withdrawal occurring no later than four months. Participants were followed up to 18 months after being randomized. | | OG001 | Randomized to Control Group | Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to control group, where the continued on the pre-randomization standard care of mycophenolate mofetil, prednisone, and tacrolimus. Participants were followed up to 18 months after being randomized. |
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| Secondary | Percentage of Participants With Donor-Specific Memory Using Elispot | This endpoint was unable to be analyzed because the study was terminated early after stopping rules were met. | No analyses were performed due to early study closure. | Posted | | | | | | 6 to 18 months post-randomization | | | | ID | Title | Description |
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| OG000 | Randomized to Tacrolimus Withdrawal | These participants were enrolled into the study and received a living-donor kidney allograft transplant. Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to tacrolimus withdrawal. Following randomization these participants had their dose of tacrolimus withdrawn gradually over three to four months, with complete withdrawal occurring no later than four months. Participants were followed up to 18 months after being randomized. | | OG001 | Randomized to Control Group | Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to control group, where the continued on the pre-randomization standard care of mycophenolate mofetil, prednisone, and tacrolimus. Participants were followed up to 18 months after being randomized. |
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| Secondary | Percentage of Participants in the Experimental Arm Off Tacrolimus | Participants in the 'Randomized to Tacrolimus Withdrawal' group were considered fully withdrawn once they no longer received any doses of tacrolimus. Participants met this endpoint if they did not resume taking tacrolimus as of 18 months post randomization with stable allograft function and without rejection of donor-specific antibodies. | | Posted | | Number | | percentage of participants | | 18 months post-randomization | | | | ID | Title | Description |
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| OG000 | Randomized to Tacrolimus Withdrawal | These participants were enrolled into the study and received a living-donor kidney allograft transplant. Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to tacrolimus withdrawal. Following randomization these participants had their dose of tacrolimus withdrawn gradually over three to four months, with complete withdrawal occurring no later than four months. Participants were followed up to 18 months after being randomized. |
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| Secondary | Incremental Change in IF/TA Scores | This endpoint was unable to be analyzed because the study was terminated early after stopping rules were met. | No analyses were performed due to early study closure. | Posted | | | | | | 6 to 18 months post-transplant | | | | ID | Title | Description |
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| OG000 | Randomized to Tacrolimus Withdrawal | These participants were enrolled into the study and received a living-donor kidney allograft transplant. Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to tacrolimus withdrawal. Following randomization these participants had their dose of tacrolimus withdrawn gradually over three to four months, with complete withdrawal occurring no later than four months. Participants were followed up to 18 months after being randomized. | | OG001 | Randomized to Control Group | Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to control group, where the continued on the pre-randomization standard care of mycophenolate mofetil, prednisone, and tacrolimus. Participants were followed up to 18 months after being randomized. |
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| Secondary | Measurement of Urinary Parameters Before and After Randomization | This endpoint was unable to be analyzed because the study was terminated early after stopping rules were met. | No analyses were performed due to early study closure. | Posted | | | | | | 6 months post-transplantation to 18 months post-randomization | | | | ID | Title | Description |
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| OG000 | Randomized to Tacrolimus Withdrawal | These participants were enrolled into the study and received a living-donor kidney allograft transplant. Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to tacrolimus withdrawal. Following randomization these participants had their dose of tacrolimus withdrawn gradually over three to four months, with complete withdrawal occurring no later than four months. Participants were followed up to 18 months after being randomized. | | OG001 | Randomized to Control Group | Participants were given an induction therapy with rabbit antithymocyte globulin (1.5-2.0 mg/kg daily for 5 days) and treated with a regimen of mycophenolate mofetil (target dose of 1000 mg twice daily), prednisone (no less than 5 mg/day or 10 mg every other day) and tacrolimus (0.1 mg/kg twice daily, adjusted to target trough levels of 8-12 ng/ml in first 3 months post-transplant, 5-8 ng/ml thereafter). Participants were followed for 6-8 months then randomized to control group, where the continued on the pre-randomization standard care of mycophenolate mofetil, prednisone, and tacrolimus. Participants were followed up to 18 months after being randomized. |
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