Table 2 Candidate Regression Models for 24 hUP and RMSE value in the training cohort

0

UPCR

1.10

1

β₀ + β₁ × UPCR

0.91

2

(β₀ + β₁× \(\sqrt{\mathrm{UPCR}}\)square root of UPCR)²

0.93

3

(β₀ + β₁× \(\sqrt{\mathrm{UPCR}}\)square root of UPCR + β₂× gender + β₃ × age)²

0.89

4

(β₀ + β₁× \(\sqrt{\mathrm{UPCR}}\)square root of UPCR + β₂× gender + β₃ × age + β₄ × UPCR) ²

0.88

5

(β₀ + (β₁ + β₂ × gender + β₃ × age)× \(\sqrt{\mathrm{UPCR}}\)square root of UPCR)²

0.88