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Comparisons of serological test for IgG and IgM antibodies against SARS-CoV-2 among SLE, RA and HCs.
| Serological indicators | SLE (n = 60) | RA (n = 70) | HCs (n = 35) | Chi-square | P-value |
|---|---|---|---|---|---|
| IgG antibody against SARS-CoV-2 (+/-) | 30/30 | 40/30 | 23/12 | 2.249 | 0.325 |
| IgM antibody against SARS-CoV-2 (+/-) | 5/55 | 6/64 | 1/34 | 1.154 | 0.632a |
SARS-CoV-2: Severe Acute Respiratory Syndrome Coronavirus 2; SLE: systemic lupus erythematosus; RA: rheumatoid arthritis; HCs: healthy controls;
Fisher’s exact test.
