Table 3.

Correlation statistics of different T cell population counts with the clinical and radiological severity criteria in COV-HD and COV patients

		Clinical Severity Parameters				Radiological Severity Parameters
		Number of days of admission	Hypoxemia	ICU Admission	In-Hospital Mortality	TSS CTa	Percentage of GGOa
COV-HD	Lymphocytes	R = − 0.33s P 0.07s	R = − 0.5s P 0.004sa	R = − 0.36s P 0.04sa	R = − 0.3s P 0.09s	R = − 0.41s P 0.02sa	R = − 0.45s P 0.01sa
	NLRa	R = 0.4s P 0.02sa	R = 0.54s P 0.002sa	R = 0.64s P < 0.001sa	R = 0.71s P < 0.001sa	R = 0.61s P < 0.001sa	R = 0.63s P < 0.001s
	CD4+ T cells	R = − 0.14s P 0.4s	R = 0.26s P 0.1s	R = 0.18s P 0.3s	R = − 0.1s P 0.3s	R = − 0.25s P 0.1s	R = − 0.2s P 0.2s
	Tregs	R = 0.1s P 0.4s	R = 0.1s P 0.4s	R = 0.1s P 0.4s	R = 0.1s P 0.4s	R = 0.1s P 0.3s	R = 0.2s P 0.2s
	CD39 Expressing Tregs	R = 0.09s P 0.6s	R = 0.05s P 0.08s	R = 0.1s P 0.5s	R = 0.1s P 0.3s	R = 0.1s P 0.5s	R = 0.1s P 0.3s
COV	Lymphocytes	R = 0.04 s P 0.85 s	R = − 0.06 s P 0.7 s	R = 0.02 s P 0.8 s	R = 0.004 s P 0.9 s	R = 0.18s P 0.3s	R = 0.31s P 0.08s
	NLR	R = 0.1 s P 0.5 s	R = 0.06 s P 0.7 s	R = 0.29 s P 0.1 s	R = 0.13 s P 0.4 s	R = 0.06 s P 0.7 s	R = −.09 s P 0.6 s
	CD4+ T cells	R = − 0.4s P 0.03sa	R = − 0.1s P 0.5s	R = − 0.2s P 0.2s	R = − 0.54s P 0.003sa	R = − 0.53s P 0.003sa	R = − 0.01s P 0.9s
	Tregs	R = 0.09s P 0.6s	R = − 0.05s P 0.7s	R = 0.1s P 0.4s	R = − 0.3s P 0.06s	R = − 0.2s P 0.3s	R = − 0.06s P 0.7s
	CD39 Expressing Tregs	R = −0.01s P 0.9s	R = − 0.06s P 0.7s	R = 0.3s P 0.08s	R = − 0.1s P 0.5s	R = − 0.14s P 0.4s	R = − 0.07s P 0.7s

R: correlation coefficient (^S: spearman rank test)

NLR Neutrophil to lymphocytes ratio

TSS CT Total severity score in chest computed tomography

GGO Ground Glass Opacity

P P value

^asignificant correlations