Table 3.

Multivariate analysis of independent risk factors for 28-day mortality

Variable	B	SE	Wald	p value	Odds ratio	95% CI for odds ratio
						Lower limit	Upper limit
NK PD-L1	0.021	0.010	4.251	0.039	1.022	1.001	1.042
SOFA score	0.234	0.067	12.089	0.001	1.263	1.107	1.441
Constant	− 3.441	0.703	23.936	0.000	0.032

SOFA sepsis-related organ failure assessment, NK PD-L1 positive percentage of PD-L1 in NK cells