Table 1.

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

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

Bold numbers show agreement between UD and U_osm.

AKI, acute kidney injury; CKD, chronic kidney disease.