Table 3.
The correlation between the investigated methods and the reference anti-SARS-CoV-2 IgG results, as assessed with r Spearman correlation test.
| Comparison | Significance level p | Correlation r | Strenght of correlation r |
|---|---|---|---|
| Reference result vs IgG Vircell | p < 0.0001 | r = 0.5768 | High |
| Reference result vs IgG Euroimmun | p < 0.0001 | r = 0.5891 | High |
| Reference result vs IgG Novatec | p < 0.0001 | r = 0.8656 | Very high |
| Reference result vs IgG Snibe | p < 0.0001 | r = 0.9003 | Almost perfect |
| Reference result vs IgG Diasorin | p < 0.0001 | r = 0.9112 | Almost perfect |
| Reference result vs IgG Abbott | p < 0.0001 | r = 0.9684 | Almost perfect |
| Reference result vs Roche | p < 0.0001 | r = 1 | Perfect |
Anti-SARS-CoV-2 IgG antibodies testing.