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Levels of serum ACPA and saliva IgA stratified by detectable salivary Aa. No differences of importance in levels between the two groups were detected.
| RA Patients with Aa in Saliva | RA Patients without Aa in Saliva | |
|---|---|---|
| Positive serum IgG ACPA | 22 (79%) | 128 (80%) |
| Positive serum IgA ACPA | 12 (43%) | 74 (46%) |
| Positive saliva IgA ACPA | 2 (7%) | 18 (11%) |
| Total IgA in saliva, median μg/mL (IQR) | 61 (53) | 62 (50) |
| SC ACPA in serum, median µg/mL (IQR) | 52 (44) | 68 (46) |
