Indicator Details — Solid Organ Transplant Population: Prevalence of CKD Stages 3-5 at 1-Year Follow-up Among Adult Kidney Transplant Recipients
Data Sources
 
Stratification and Year Choices:

  Source
  • SRTR

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In 2011 the proportion of all kidney transplant recipients with CKD (stages 3-5) 1-year post-transplant was about 50%; the proportion with ESRD (dialysis or kidney retransplant) was about 2%.
Chart Explanation: The chart displays on the x-axis age groups by different risk factors (gender, race/ethnicity, diabetes and hypertension) and on the y-axis the prevalence of CKD stages 3-5 at one year post-kidney transplant.
Individuals who receive a solid organ transplant in the United States are followed up annually for assessment of their health status. These data are recorded in the Scientific Registry of Transplant Recipients (SRTR). All analyses presented are limited to adults, 20 years of age and older, at the time of their first organ transplant. These data are nationally-representative of the first-time, solid-organ transplant population with fewer than 5% lacking information on kidney function.

Individuals who receive a solid organ transplant in the United States are followed up annually on the anniversary of the transplant date for an assessment of their health status. These data are recorded in the Scientific Registry of Transplant Recipients (SRTR). All analyses presented are limited to adults, 20 years of age and older, at the time of their first organ transplant. Diabetes status (type 1 or 2) and hypertension status are as listed at the time of transplant. For all transplant recipients, use of calcineurin inhibitors (CNI) to prevent transplant rejection is presented as many of these medications have been shown to be nephrotoxic (see Ojo, 2007, for a review). The recording of data in the SRTR pertaining to CKD/kidney function varies by organ type and is discussed below.

Information on kidney transplant recipients includes serum creatinine measurements for each follow-up visit as well as whether the patient has been treated for end-stage renal disease (ESRD) through dialysis or a kidney retransplant since the last follow-up. CKD stages 3-5 is defined by an MDRD study equation estimated eGFR <60 ml/min/1.73 m². Additional data collected for kidney transplant recipients includes donor type (deceased vs. living donor), and whether the donor was considered an expanded criteria donor (e.g. a donor that may have been advanced in age, diabetic, had prior infection with hepatitis B or C, etc.).
FieldData
Description of MeasurePrevalence of CKD (by eGFR) and Renal Dysfunction
Data SourceScientific Registry of Transplant Recipients
Type of Data SourceRegistry
Data SetSRTR
Health Care System DataNo
Regional or National?National
Demographic GroupSolid Organ Transplant Recipients
NumeratorPatients in denominator with eGFR<60 (Liver, Kidney) or ‘renal dysfunction’ (Thoracic) at time of follow-up
DenominatorPatients with a valid follow-up code who had a first solid organ transplant between 1999 and 2006 and were at least 20 years old at time of transplant.
Definition of diagnosed CKDStage 3, eGFR 30-59 ml/min per 1.73 m² Stage 4, 15-29 ml/min per 1.73 m² Stage 5, <15 ml/min per 1.73 m²
Glomerular filtration rateEstimated using MDRD formula for calibrated creatinine: eGFR=186 × [(calibrated serum creatinine in mg/dl)-1.154] × age-0.203 × (0.742 if female) × (1.210 if African-American)
Primary Data Source IndicatorSerum Creatinine measurements/Renal Dysfunction indicator
Primary Indicator Method of MeasurementTransplant follow-up
Secondary (1) VariableType of organ transplant
Secondary (1) Indicator Method of MeasurementRegistry
Secondary (2) VariableAge
Secondary (2) Indicator Method of MeasurementRegistry
Secondary (3) VariableRace/ethnicity
Secondary (3) Indicator Method of MeasurementRegistry
Secondary (4) VariableGender
Secondary (4) Indicator Method of MeasurementRegistry
Secondary (5) VariableDiabetes
Secondary (5) Indicator Method of MeasurementRegistry
Secondary (6) VariableHypertension
Secondary (6) Indicator Method of MeasurementRegistry
Secondary (7) VariableCalcineurin Treatment
Secondary (7) Indicator Method of MeasurementRegistry
Secondary (8) VariableExpanded Criteria Donor Status
Secondary (8) Indicator Method of MeasurementRegistry
Frequency of Measurement (Primary)Multiple measurements per patient
Period Currently Available2011
Pending DataNone
Additional Data Items of InterestTrends over time, other stratification variables of interest
Analytical ConsiderationsMissing data on serum creatinine measurements may be informative
Limitations of IndicatorReporting of data across organ types is not consistent. Reporting of kidney function for thoracic recipients may be subjective. Serum creatinine measurements are only taken once per follow-up, probably resulting in a large standard error.
Suggested Citation:
Centers for Disease Control and Prevention. Chronic Kidney Disease Surveillance System—United States.
website. http://www.cdc.gov/ckd