Table 4 Coefficients (and 95% confidence intervals) of the variables used to calculate the Kidney Donor Risk Index from the original development, the updated Cox proportional hazards model and the updated cause-specific Cox model
Variable | Original | Updated (Cox model) | Updated (cause-specific Cox model) |
|---|---|---|---|
Age-18; for donors under 18 years | − 0.019 (− 0.031, − 0.010) | − 0.032 (− 0.096, 0.033) | − 0.031 (− 0.095, 0.033) |
Age-40, years | 0.013 (0.011, 0.015) | 0.016 (0.009, 0.024) | 0.016 (0.009, 0.024) |
Age-50; for donors over 50 years | 0.011 (0.005, 0.016) | 0.003 (− 0.010, 0.016) | 0.003 (− 0.010, 0.016) |
Height per 10 cm increase | − 0.046 (− 0.062, − 0.031) | − 0.034 (− 0.093, 0.026) | − 0.034 (− 0.093, 0.026) |
Weight per 5 kg increase; for donors below 80 kg | − 0.020 (− 0.031, − 0.010) | − 0.035 (− 0.068, − 0.002) | − 0.035 (− 0.068, − 0.002) |
Ethnicity | |||
 Not Black ethnic origin | Reference | ||
 Black ethnic origin | 0.179 (0.122, 0.239) | 0.409 (− 0.017, 0.835) | 0.405 (− 0.021, 0.832) |
History of hypertension | |||
 No | Reference | ||
 Yes | 0.126 (0.077, 0.174) | 0.256 (0.135, 0.378) | 0.255 (0.133, 0.376) |
History of diabetes | |||
 No | Reference | ||
 Yes | 0.130 (0.039, 0.215) | 0.154 (− 0.050, 0.358) | 0.153 (− 0.051, 0.357) |
Cause of death CVA | |||
 No | Reference | ||
 Yes | 0.088 (0.039, 0.131) |  − 0.035 (− 0.308, 0.238) |  − 0.036 (− 0.309, 0.237) |
Creatinine-1, mg/dl | 0.220 (0.157, 0.285) | 0.395 (0.205, 0.586) | 0.395 (0.204, 0.586) |
Creatinine-1; for donors with creatinine > 1.5, mg/dl |  − 0.209 (− 0.301, − 0.117) |  − 0.500 (− 0.819, − 0.182) |  − 0.500 (− 0.818, − 0.181) |
HCV | |||
 Negative | Reference | ||
 Positive | 0.240 (0.122, 0.358) | 0.233 (− 1.286, 1.751) | 0.234 (− 1.284, 1.753) |
Donor type | |||
 DBD | Reference | ||
 DCD | 0.133 (0.020, 0.247) | 0.113 (0.005, 0.221) | 0.112 (0.004, 0.220) |