Table 2 Correlation of antiphospholipid antibodies with clinical and laboratory variables in patients with COVID-19.

Thiry-six patients had serum samples from multiple time points; for those patients, only the first available serum sample was used for determining correlations. ns, not significant; NETs, neutrophil extracellular traps; MPO, myeloperoxidase.

aPL score
(modified)
aCL IgGaCL IgM2GPI IgG2GPI IgMaPS/PT IgGaPS/PT IgM
SpearmanrPrPrPrPrPrPrP
Clinical and laboratory variables
SpO2/FiO2−0.051ns−0.16*−0.19*−0.10ns−0.022ns−0.11ns−0.16*
C-reactive
protein
0.031ns0.15ns0.17*0.075ns−0.040ns0.058ns0.16*
D-dimer0.087ns0.092ns0.24**0.041ns0.000ns0.005ns0.037ns
Platelet
count
0.17*0.095ns0.29****0.17*0.11ns−0.009ns0.23**
Neutrophil
count
0.10ns0.13ns0.19*0.047ns0.041ns−0.008ns0.096ns
Calprotectin0.26***0.29****0.28***0.11ns0.090ns0.25***0.23**
NETs (MPO/
DNA)
0.18*0.16*0.25***0.20**0.13ns0.033ns0.23**

*P < 0.05, **P < 0.01, ***P < 0.001, and ****P < 0.0001.