Table 3

(Partial). Subgroup analysis of the association between NAR and 90-day mortality

	N	NAR stratification			P value
	N	<23.47	23.54–27.86	>27.86	P value
Laboratory parameters
Serum sodium, mmol/L					0.0270
≤134	192	1.0	1.11 (0.66 to 1.88)	1.23 (0.74 to 2.03)
>134	283	1.0	2.01 (1.24 to 3.27)**	2.90 (1.81 to 4.67)***
Serum potassium, mmol/L					0.3218
≤3.6	211	1.0	1.71 (0.94 to 3.11)	1.94 (1.08 to 3.46)*
>3.6	264	1.0	1.44 (0.93 to 2.24)	2.24 (1.45 to 3.45)^c
Serum chloride, mmol/L					0.0702
≤100	206	1.0	1.59 (0.97 to 2.61)	1.44 (0.86 to 2.39)
>100	269	1.0	1.50 (0.91 to 2.48)	2.56 (1.59 to 4.12)***
Serum bilirubin, μmol/L					0.0343
≤0.5	192	1.0	1.91 (1.07 to 3.42)*	2.87 (1.63 to 5.05)***
>0.5	239	1.0	1.46 (0.89 to 2.37)	1.75 (1.08 to 2.84)*
Comorbidities
Respiratory failure					0.0102
No	240	1.0	1.73 (1.02 to 2.95)*	3.14 (1.89 to 5.20)***
Yes	235	1.0	1.22 (0.76 to 1.94)	1.19 (0.75 to 1.90)
RRT					0.0044
No	402	1.0	1.42 (0.96 to 2.11)	2.29 (1.58 to 3.32)***
Yes	73	1.0	0.87 (0.36 to 2.09)	0.45 (0.18 to 1.11)
Stroke					0.0742
No	454	1.0	1.44 (1.01 to 2.05)*	1.85 (1.31 to 2.61)***
Yes	21	1.0	NA	NA
Malignancy					0.3513
No	421	1.0	1.53 (1.05 to 2.25)*	2.15 (1.48 to 3.12)***
Yes	54	1.0	1.58 (0.59 to 4.26)	1.08 (0.41 to 2.85)

P value: *p< 0.05, **p< 0.01, ***p< 0.001.
N/A, not applicable; RRT, renal replacement therapy;
NAR, neutrophil-albumin ratio.;