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

Table 3

Subgroup analysis of the associations between RDW and hospital mortality.

	No. of patients	OR (95%CI)	P value
Age, year
18-68.2	7014	1.07 (1.02, 1.13)	0.0080
68.3-91.4	7064	1.07 (1.02, 1.13)	0.0055
Gender
F	5992	1.08 (1.02, 1.14)	0.0043
M	8086	1.05 (1.00, 1.10)	0.0657
CHF
No	11643	1.08 (1.04, 1.12)	0.0002
Yes	2435	1.04 (0.95, 1.14)	0.3920
AKI stage
Stage 1	2395	1.12 (1.01, 1.24)	0.0268
Stage 2	2707	1.09 (1.00, 1.18)	0.0444
Stage 3	8976	1.06 (1.01, 1.10)	0.0119
AF
No	9459	1.08 (1.03, 1.12)	0.0011
Yes	4619	1.06 (0.99, 1.12)	0.0830
COPD
No	13721	1.07 (1.03, 1.11)	0.0002
Yes	357	1.01 (0.77, 1.32)	0.9696
CAD
No	9856	1.07 (1.03, 1.11)	0.0004
Yes	4222	1.03 (0.94, 1.12)	0.5476
Stroke
No	12542	1.09 (1.05, 1.13)	<0.0001
Yes	1536	1.04 (0.92, 1.17)	0.4969
Respiratory failure
No	8298	1.02 (0.96, 1.09)	0.4467
Yes	5780	1.09 (1.04, 1.14)	0.0002
Pneumonia
No	9966	1.06 (1.01, 1.11)	0.0170
Yes	4112	1.08 (1.02, 1.14)	0.0076
ARDS
No	13778	1.07 (1.03, 1.11)	0.0003
Yes	300	1.00 (0.80, 1.26)	0.9832
Liver
No	13174	1.08 (1.04, 1.12)	0.0001
Yes	904	1.01 (0.93, 1.11)	0.7745
Vasoactive drug
No	6993	1.04 (0.98, 1.10)	0.2382
Yes	7085	1.09 (1.04, 1.14)	0.0001
RRT
No	12938	1.09 (1.05, 1.13)	<0.0001
Yes	1140	0.97 (0.89, 1.06)	0.4664
SIRS
0	104	1.28 (0.81, 2.00)	0.2891
1	887	1.27 (1.13, 1.42)	<0.0001
2	2952	1.27 (1.20, 1.35)	<0.0001
3	5486	1.26 (1.21, 1.31)	<0.0001
4	4873	1.20 (1.15, 1.24)	<0.0001

CHF: congestive heart failure; AKI: acute kidney injury; AF: atrial fibrillation; COPD: chronic obstructive pulmonary disease; CAD: coronary artery disease; ARDS: acute respiratory distress syndrome; RRT: renal replacement therapy; SIRS: systemic inflammatory response syndrome.