Convalescent plasma therapy and mortality in COVID-19 patients admitted to the ICU: a prospective observational study

Annals of Intensive Care

Table 2 Propensity score model for treatment group assignment

Variable	Multivariable odds ratio (OR)	95% CI	p
Demographic variables
Age (per 5 years increase)	0.67	0.51–0.89	0.006
“Firstwave” of COVID-19 (per 30-day increase)	1.80	1.31–2.48	< 0.0001
Number of comorbidities (per 1 condition increase)	1.98	1.27–3.07	0.002
Chronic renal failure	0.16	0.02–1.04	0.05
Active malignancy	8.03	0.26–250.22	0.235
paO₂/FiO₂ (per 10 units increase)	0.72	0.60–0.87	0.001
Lactate (per 1 mmol/l increase)	0.77	0.60–0.99	0.038
CRP (per 50 mg/dl increase)	1.44	0.98–2.12	0.063
Ferritin (per 1000 ng/ml increase)	1.25	0.95–1.64	0.107
Absolute neutrophil count (per 1 G/increase)	0.76	0.63–0.92	0.004