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Table 1 Comparison between urinary density (UD) and osmolality (U osm ) classification of low and high concentration ability

From: Is urinary density an adequate predictor of urinary osmolality?

UD criteria

Osmolality criteria

All patients

Low (<350mOsm/kg)

Normal (350-600mOsm/kg)

High (>600mOsm/kg)

Low UD (≤1.010 kg/L)

71

27

20

Normal UD (1.011 – 1.019 kg/L)

79

89

43

High (UD ≥1.020 kg/L)

26

25

36

Patients with AKI

 

Low UD (≤1.010 kg/L)

28

2

0

Normal UD (1.011 – 1.019 kg/L)

20

17

2

High (UD ≥1.020 kg/L)

13

11

2

Patients with CKD

 

Low UD (≤1.010 kg/L)

8

10

10

Normal UD (1.011 – 1.019 kg/L)

23

38

6

High (UD ≥1.020 kg/L)

3

5

3

Patients with glomerulonephritis

 

Low UD (≤1.010 kg/L)

28

7

1

Normal UD (1.011 – 1.019 kg/L)

36

21

2

High (UD ≥1.020 kg/L)

10

9

4

Healthy individuals

 

Low UD (≤1.010 kg/L)

7

8

9

Normal UD (1.011 – 1.019 kg/L)

0

13

33

High (UD ≥1.020 kg/L)

0

0

27

  1. Bold numbers show agreement between UD and Uosm.
  2. AKI, acute kidney injury; CKD, chronic kidney disease.