Table 3 Results of the Cox proportional hazards regression on time to death and time to RRT inception

 Validation cohort

1.085 (0.886–1.328)

0.429

  1

0.298 (0.237–0.376)

<0.001

  2

0.932 (0.768–1.131)

0.476

  3

1.379 (0.640–2.974)

0.412

  4

0.122 (9.058–0.257)

<0.001

  5

0.604 (0.281–1.300)

0.197

  6

0.989 (0.723–1.354)

0.945

  7

Ref.

  V 1

1.766 (0.948–3.291)

0.073

  V 2

0.942 (0.721–1.230)

0.658

  V 3

1.129 (0.480–2.655)

0.782

  V 4

0.526 (0.107–2.587)

0.429

  V 5

0.878 (0.285–2.710)

0.821

  V 6

0.886 (0.553–1.418)

0.614

  V 7

Ref.

 Validation cohort

1.196 (0.705–2.029)

0.508

  1

0.308 (0.208–0.455)

<0.001

  2

Ref.

  3

3.848 (2.726–5.433)

<0.001

  4

0.876 (0.531–1.446)

0.605

  5

0.948 (0.470–1.914)

0.882

  6

0.395 (0.244–0.640)

<0.001

  7

0.442 (0.262–0.744)

0.002

  V 1

0.765 (0.383–1.530)

0.449

  V 2

Ref.

  V 3

0.567 (0.247–1.301)

0.181

  V 4

0.441 (0.257–0.756)

0.003

  V 5

0.230 (0.080–0.663)

0.007

  V 6

0.379 (0.155–0.929)

0.034

  V 7

0.389 (0.183–0.827)

0.014