Table 2 Different models for predicting kidney allograft function decline by multivariable Cox regression analysis

 Age, years (≥ 47 vs < 47)

2.21 (1.10–4.45)

0.03

 Baseline eGFR, mL/min/1.73 m² (≤ 37 vs > 37)

4.58 (2.44–8.62)

< 0.001

 Proteinuria, g/24 h (≥ 0.75 vs < 0.75)

3.75 (2.02–6.93)

< 0.001

Model 2

 Cortical ADC_T, ×10⁻³ mm²/s (≤ 1.94 vs > 1.94)

2.58 (1.03–6.48)

0.04

 Cortical D, ×10⁻³ mm²/s (≤ 1.47 vs > 1.47)

3.00 (1.34–6.73)

0.008

 Cortical D*, ×10⁻³ mm²/s (≤ 4.57 vs > 4.57)

3.96 (1.77–8.89)

0.001

 Cortical fp (≤ 0.281 vs > 0.281)

3.48 (1.80–6.74)

< 0.001

Model 3

 Age, years (≥ 47 vs < 47)

1.35 (0.60–3.03)

0.48

 Baseline eGFR, mL/min/1.73 m² (≤ 37 vs > 37)

3.52 (1.61–7.71)

0.002

 Proteinuria, g/24 h (≥ 0.75 vs < 0.75)

2.94 (1.43–6.08)

0.003

 Cortical ADC_T, ×10⁻³ mm²/s (≤ 1.94 vs > 1.94)

1.97 (0.76–5.09)

0.16

 Cortical D, ×10⁻³ mm²/s (≤ 1.47 vs > 1.47)

3.93 (1.81–8.51)

0.001

 Cortical D*, ×10⁻³ mm²/s (≤ 4.57 vs > 4.57)

2.08 (0.89–4.88)

0.09

 Cortical fp (≤ 0.281 vs > 0.281)

2.85 (1.34–6.05)

0.006