| Therapeutic class/Medication | Category | Anemia (N, %) | p-value | |
| Methotrexate | No | 6 | 42.9 |
|
| Yes | 17 | 48.6 | 0.717 | |
| Corticosteroids | No | 9 | 47.4 |
|
| Yes | 14 | 46.7 | 0.962 | |
| Anti TNF-α | No | 15 | 55.6 |
|
| Yes | 8 | 36.4 | 0.181 | |
| Anti-IL-6R | No | 21 | 52.5 |
|
| Yes | 2 | 22.2 | 0.145F | |
| Hydroxychloroquine | No | 20 | 47.6 |
|
| Yes | 3 | 42.9 | 1.000F | |
| Other immunosuppressant drugs | No | 22 | 50.0 |
|
| Yes | 1 | 20.0 | 0.353F | |
| Anti CD20 MCA | No | 21 | 47.7 |
|
| Yes | 2 | 40.0 | 1.000F | |
| Folic acid | No | 12 | 44.4 |
|
| Yes | 11 | 50.0 | 0.698 | |
| NSAIDs | No | 16 | 41.0 |
|
| Yes | 7 | 70.0 | 0.157F | |