Table 3.

Clinical outcomes associated with urea-to-creatinine ratio level.

UCR quartile	Adjusted OR	95% CI	p value
Inpatient mortality
Quartile 2	0.98	(0.82–1.17)	0.804
Quartile 3	1.29	(1.09–1.53)	0.003*
Quartile 4	1.97	(1.68–2.31)	< 0.001*
Hospital readmission within 30-days
Quartile 2	1.02	(0.94–1.12)	0.631
Quartile 3	1.05	(0.96–1.15)	0.255
Quartile 4	1.24	(1.12–1.36)	< 0.001*
Intensive care unit admission
Quartile 2	0.90	(0.79–1.02)	0.087
Quartile 3	0.88	(0.77–1.01)	0.066
Quartile 4	0.90	(0.78–1.03)	0.122
Hospital length-of-stay
Quartile 2	0.79	(0.60–1.03)	0.076
Quartile 3	1.18	(0.88–1.57)	0.269
Quartile 4	2.02	(1.39–2.94)	< 0.001*

UCR Urea-to-creatinine ratio; OR Odds ratio; 95% CI 95% Confidence interval; IR incidence ratio.

Odds/incidence ratios were adjusted for age, sex, CCI score, eGFR and acute kidney injury status on admission by multivariate logistic regression analysis.

*p value < 0.05 in multivariate analysis was considered statistically significant.