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Table 1 Association between Venous Excess UltraSound (VExUS) grading system prototypes and the risk of acute kidney injury in the post-operative period

From: Quantifying systemic congestion with Point-Of-Care ultrasound: development of the venous excess ultrasound grading system

Grading system

Grade

HR

CI

p values

VExUS A

0

Reference category

  

1

1.10

0.44–2.73

0.84

2

1.41

0.58–3.43

0.44

3

3.21

1.55–6.67

0.002

VExUS B

0

Reference category

  

1

1.10

0.44–2.74

0.84

2

2.11

0.85–2.74

0.11

3

2.43

1.18–5.02

0.02

VExUS C

0

Reference category

  

1

1.25

0.58–2.66

0.57

2

2.65

1.07–6.60

0.036

3

3.69

1.65–8.24

0.001

VExUS D

0

Reference category

  

1

1.71

0.78–3.74

0.18

2

1.95

1.02–3.75

0.045

VExUS E

0

Reference category

  

1

1.72

0.78–3.80

0.18

2

2.68

1.41–5.12

0.003

  1. Proportional hazard regression models (Cox) with VExUS grading systems considered as time varying covariates (i.e., VExUS grade at day 0 is used to predict acute kidney injury (AKI) at day 1, VExUS grade at day 1 is used for AKI at day 2 and so on). HR hazard ratio, CI 95% confidence intervals)