Table 4.

Correlation coefficient for DL_CO.

Characteristics	Spearman’s correlation coefficient	p value
Age, years	0.014	0.838
Sex	0.105	0.136
Heart rate (bpm)	− 0.229	0.004
Oxygen saturation on room air (%)	0.360	< 0.001
Dyspnea	− 0.133	0.059
Duration of hospital stay	− 0.347	< 0.001
ARDS	− 0.250	< 0.001
Noninvasive mechanical ventilation	− 0.111	0.116
Invasive mechanical ventilation	− 0.174	0.014
Glucocorticosteroid use	0.295	< 0.001
Leukocyte count (109/L)	− 0.250	0.001
Hemoglobin	− 0.279	< 0.001
Hypersensitive C-reactive protein (mg/L)	0.247	0.003
Lactate dehydrogenase (U/L)	− 0.332	< 0.001
d-Dimer (mg/L)	0.295	0.001
CT score of initial CT
Total lesions	− 0.206	0.003
CT score of GGO	− 0.277	< 0.001
Reticular	− 0.199	0.004
Complete radiological resolution	0.377	< 0.001
CT score of follow-up CT
Total lesions	− 0.246	< 0.001
GGO	− 0.246	0.003
Reticular	− 0. 206	0.002
Air-trapping	− 0.220	0.002
RVC of whole lung	− 0.265	0.001
RVC of right lung	− 0.276	0.001
RVC of left lung	− 0.257	0.002

All data were analyzed using Spearman correlation. HR heart rate, ARDS acute respiratory distress syndrome, GGO ground-glass opacities.