Within patients with primary Sjögren’s syndrome there is a positive ordinal relationship between FCGR3B copy number and rheumatoid factor (RF) titer and serum IgG levels, and an inverse ordinal trend with the risk of neutropenia.
| Variable | N | Ordinal Test | Coefficient | p |
|---|---|---|---|---|
| RF titer | 140 | Gamma correlation | 0.33 | 0.001 |
| Serum IgG | 138 | Gamma correlation | 0.20 | 0.031 |
| Neutropenia (proportion) | 26/154 (17%) | Proportional OR | 0.46 (0.18, 1.21) | 0.12 |