Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Prevalence and Characteristics of Rheumatoid Factor Antibodies in Patients with COVID-19
| Rheumatoid Factor Antibodies | COVID (n=129) |
|---|---|
| Overall prevalence in any RFs, n (%) | 26 (20.16) |
| RF-IgA | 13 (10.32) |
| RF-IgG | 8 (6.35) |
| RF-IgM | 12 (9.52) |
| RF-IgA +RF-IgG | 1 (0.78) |
| RF-IgA +RF-IgM | 2 (1.55) |
| RF-IgG+RF-IgM | 2 (1.55) |
| RF-IgA +RF-IgG+RF-IgM | 1 (0.78) |
Note: The cutoff values for positivity in all rheumatoid factor antibodies were set >18 kU/L based on the recommendations of the manufacturer.
