| CEPI-DC | Center for Epidemiology of Medical Causes of Death |
| CIP | Presentation Identifier Code |
| COPD | Chronic Obstructive Pulmonary Disease |
| CTLA-4 | Cytotoxic T-lymphocyte-associated antigen 4 |
| ICU | Intensive Care Unit |
| ID | Inflammatory Disease |
| IL-6 | Interleukin 6 |
| JAKi | Janus Kinase Inhibitor |
| MTX | Methotrexate |
| PMSI | Medicalization of Information Systems Program |
| RA | Rheumatoid Arthritis |
| SCT | Synthetic conventional therapy |
| TNF | Tumor Necrosis Factor |
| TNF-i | Tumor Necrosis Factor Inhibitor |
| tsDMARD | targeted synthetic disease-modifying antirheumatic drug |
| UCD | Dispensing Unit Code |