Table 1.

Baseline characterictics of treatment group

Characteristics	UC-MSC		Total (n)	P value
	Intubated (n = 99)	Unintubated (n = 111)
Sex, n (%)			210	0,64a
Male	74 (74.7%)	79 (71.2%)	153
Female	25 (25.3%)	32(28.8%)	57
Age, mean ± SD, years	61.22 ± 11.77	57.36 ± 12.00		0,02b
Age range, years	27–83	23–81
Weight, mean ± SD, kg	90.63 ± 12.86	83.86 ± 11.66		< 0,001b

In this study, patients who were intubated were in the critical disease category, while patients who were not intubated were in the severe disease category. COVID-19 disease severity; Mild, moderate, severe and critically disease. Severe Illness: Individuals who have SpO2 < 94% on room air at sea level, a ratio of arterial partial pressure of oxygen to fraction of inspired oxygen (PaO2/FiO2) < 300 mm Hg, respiratory frequency > 30 breaths/min, or lung infiltrates > 50%. Critical Illness: Individuals who have respiratory failure, septic shock, and/or multiple organ dysfunction (3)

Abbreviations: UC-MSC umbilicial cord mesenchymal stem cell, n number of samples

^a Pearson Chi-square test

^b t-test