The Association between Red Blood Cell Distribution Width and Mortality in Critically Ill Patients with Acute Kidney Injury

Table 2

ORs (95% CIs) for mortality across groups of RDW.

RDW, %	Non-adjusted		Model I		Model II
	OR (95%CIs)	P value	OR (95%CIs)	P value	OR (95%CIs)	P value
Hospital mortality
Per 1 sd	1.24 (1.21, 1.27)	<0.0001	1.23 (1.20, 1.26)	<0.0001	1.12 (1.07, 1.17)	<0.0001
Quartiles
11.1 - 13.4	1.0(ref)		1.0(ref)		1.0(ref)
13.5 - 14.3	1.33 (1.14, 1.55)	0.0003	1.22 (1.05, 1.43)	0.0100	1.06 (0.82, 1.36)	0.6517
14.4 - 15.6	1.76 (1.52, 2.03)	<0.0001	1.56 (1.35, 1.81)	<0.0001	1.13 (0.89, 1.45)	0.3189
15.7 - 21.2	2.91 (2.53, 3.34)	<0.0001	2.66 (2.31, 3.06)	<0.0001	1.57 (1.22, 2.01)	0.0004
P trend	<0.0001		<0.0001		<0.0001
30-day all-cause mortality
Per 1 sd	1.24 (1.22, 1.27)	<0.0001	1.24 (1.21, 1.26)	<0.0001	1.13 (1.09, 1.18)	<0.0001
Quartiles
11.1 - 13.4	1.0(ref)		1.0(ref)		1.0(ref)
13.5 - 14.3	1.32 (1.14, 1.53)	0.0002	1.18 (1.02, 1.37)	0.0255	1.04 (0.82, 1.33)	0.7386
14.4 - 15.6	1.70 (1.47, 1.95)	<0.0001	1.44 (1.25, 1.66)	<0.0001	1.16 (0.91, 1.47)	0.2287
15.7 - 21.2	2.97 (2.60, 3.39)	<0.0001	2.65 (2.32, 3.02)	<0.0001	1.67 (1.31, 2.12)	<0.0001
P trend	<0.0001		<0.0001		<0.0001

OR: odds ratio; CI: confidence interval.
Adjust I model; adjust for: age and gender.
Adjust II model; adjust for: age; gender; albumin; hemoglobin; liver disease; renal disease; malignancy; bilirubin; WBC; BUN; APSIII; SOFA; SIRS; RRT; temperature; Elixhauser.