The Effect of Fluid Overload on Attributable Morbidity after Cardiac Surgery: A Retrospective Study

Table 3

Univariate analyses.

	Q1; n = 186	Q2; n = 188	Q3; n = 187	Q4; n = 187	value
Duration of mechanical ventilation (hours)	2.9 [2.4–3.7]	3.0 [2.4–4.2]	3.3 [2.6–4.4]	4.7 [3.1–9.2]	<0.001^a,b,c,d
LOS in the ICU (days)	1.0 [1.0–1.0]	1.0 [1.0–1.0]	1.0 [1.0–1.0]	1.0 [1.0–2.0]	<0.001^b,c,d
CVP	9 [6–11]	9 [7–11]	9 [7–11]	10 [8–12]	0.003^b,c,d
Incidence of AKI (%)	0.5	1.1	1.1	4.8	0.007^b,c,d
ICU mortality (%)	0.5	1.1	0.0	3.2	0.025^d

Data are expressed as median [interquartile range] or as percentage. LOS, length of stay; CVP, central venous pressure; AKI, acute kidney injury; ICU, intensive care unit. ^a: significant difference between Q1 and Q3; ^b: significant difference between Q1 and Q4; ^c: significant difference between Q2 and Q4; ^d: significant difference between Q3 and Q4.