Table 4.
Laboratory parameters of PFAPA patients.
| Laboratory parameter | Mean ± SD (range) | |
|---|---|---|
| IgA | 1.20 ± 0.60 g/L (0.29–3.03 g/L) | |
| IgG | 10.18 ± 2.41 g/L (2.4–17.7 g/L) | |
| IgM | 0.97 ± 0.35 g/L (0.35–1.76 g/L) | |
|
| ||
| Laboratory parameter | n (%) | |
|
| ||
| IgD | <100 IE/mL | 39/48 (81%) |
| >100 IE/mL | 9/48 (19%) | |
| Antinuclear antigen antibodies | Negative | 41/41 (100%) |
| Lymphocyte subsets | Normal | 28/40 (70%) |
| Elevated | 10/40 (25%) | |
| Low | 2/40 (5%) | |
| Antistreptolysin O titer | ASO < 52 units/mL | 44/64 (69%) |
| 52 < ASO < 500 units/mL | 12/64 (19%) | |
| 500 < ASO < 1000 units/mL | 6/64 (9%) | |
| ASO > 1000 units/mL | 2/64 (3%) | |