Fluid balance, change in serum creatinine and urine output as markers of acute kidney injury post cardiac surgery: an observational study

Table 3 Estimates of the group variable parameters resulted from the multiple linear regression models

Outcome	Parameter	Unadjusted model			Adjusted model
Outcome	Parameter	Estimate	95% C.I.	p-value	Estimate	95% C.I.	p-value
CSICU Length of Stay	β1 (SCr-, UO-, FOL + vs. SCr-, UO-, FOL-)	0.09	−0.08, 0.26	0.31	0.12	−0.05, 0.29	0.16
	β2 (SCr-, UO+, FOL- vs. SCr-, UO-, FOL+)	0.31	0.04, 0.57	0.02	0.44	0.18, 0.70	0.001
	β3 (SCr-, UO+, FOL + vs. SCr-, UO+, FOL-)	0.35	0.05, 0.65	0.02	0.08	−0.21, 0.37	0.58
	β4 (SCr + vs. SCr-, UO+, FOL+)	0.16	−0.15, 0.46	0.31	0.14	−0.14, 0.41	0.32
Hospital Length of Stay	β1 (SCr-, UO-, FOL + vs. SCr-, UO-, FOL-)	0.18	−0.06, 0.41	0.14	0.29	0.04, 0.54	0.02
	β2 (SCr-, UO+, FOL- vs. SCr-, UO-, FOL+)	−0.05	−0.40, 0.30	0.78	−0.13	−0.52, 0.25	0.49
	β3 (SCr-, UO+, FOL + vs. SCr-, UO+, FOL-)	0.39	−0.004, 0.79	0.05	0.30	−0.12, 0.67	0.16
	β4 (SCr + vs. SCr-, UO+, FOL+)	0.36	−0.05, 0.77	0.08	0.27	−0.14, 0.67	0.19

SCr+: Meeting the criteria of Change in SCr ≥ 26.5 µmol/L; SCr -: Not meeting the Change in SCr criteria.
UO+: Meeting the criteria of Urine Output ≤0.5 cc/kg/hour for greater than 6 hours; UO-: Not meeting the Urine Output criteria.
FOL+: Meeting the criteria of Fluid Overload, defined as fluid balance ≥ 6.5 cc/kg; FOL-: Not meeting the Fluid Overload criteria.

ISSN: 2054-3581