Table 3.

Correlation between urine biomarkers, UCr and UOsm, during hospitalization and at 3 mo after discharge

Biomarkers	Pearson correlation coefficient
	Hospitalization				3 months after discharge
	AKI		Non-AKI		AKI		Non-AKI
	UCr	UOsm	UCr	UOsm	UCr	UOsm	UCr	UOsm
UCr	N/A	0.65	N/A	0.77	N/A	0.74	N/A	0.82
KIM-1	0.61	0.41	0.7	0.58	0.66	0.47	0.79	0.69
IL-18	0.44	0.33	0.66	0.54	0.61	0.46	0.75	0.65
MCP-1	0.45	0.18	0.75	0.65	0.65	0.47	0.8	0.7
Albumin	0.22	0.08	0.43	0.38	0.32	0.21	0.5	0.43
NGAL	0.2	0.03a	0.43	0.31	0.25	0.1	0.43	0.36
YKL-40	0.25	0.13	0.43	0.36	0.28	0.12	0.44	0.36
UMOD	0.38	0.11	0.17	−0.08	0.27	0.06a	0.14	−0.05a

AKI, acute kidney injury; IL-18, interleukin-18; KIM-1, kidney injury molecule-1; MCP-1, monocyte chemoattractant protein-1; N/A, not applicable; NGAL, neutrophil gelatinase-associated lipocalin; UCr, urine creatinine; UMOD, uromodulin; UOsm, urine osmolarity; YKL-40, chitinase 3-like 1.

Strong correlation (coefficient ≥0.6).

Moderate correlation (coefficient 0.4–0.59).

Weak or no correlation (coefficient <0.4).

P values for all correlation are statistically significant at level of 0.05 unless indicated by a footnote symbol a.

^aNot significant.