Table 4. Agreement versus the consensus median positivity of anti-SARS-CoV-2 antibodies positivity in three subjects vaccinated with BNT162b2 mRNA Covid-19 (Comirnaty, Pfizer) and followed-up for 2 months.

*With cut-off >1.7 AU/mL: 0.947 (95% CI, 0.845–1.049; p<0.001) <br>95% CI, 95% confidence interval; Ig, immunoglobulin; RBD, receptor binding domain; S, spike protein; Tot, total

Antibodies	Kappa statistics vs. consensus median
Roche Tot Ig anti-RBD	0.947 (95% CI, 0.845–1.049) p<0.001
DiaSorin TrimericS IgG	1.000 (95% CI, 1.000–1.000) p<0.001
Beckman Coulter IgG anti-RBD	0.900 (95% CI, 0.766–1.035) p<0.001
SNIBE IgG anti-RBD	0.947 (95% CI, 0.845–1.049) p<0.001
Technogenetics IgG anti-N/S1	0.764 (95% CI, 0.574–0.953)* p<0.001