Table 1 Baseline patient characteristics by vaccination status
| Â | Vaccination status | |
|---|---|---|
Baseline characteristics, n(%) | Vaccinated n= 551 | Unvaccinated n= 43,564 |
Age groups (years) | Â | Â |
   50 to 59 | 202 (36.7) | 30,156 (69.2) |
   60 to 64 | 275 (49.9) | 9,573 (22.0) |
   65 and older | 74 (13.4) | 3,835 (8.8) |
Women | 352 (63.9) | 27,091 (62.2) |
Inflammatory/Autoimmune disease | Â | Â |
   RA | 206 (37.4) | 19,120 (43.9) |
   Psoriatic arthritis | 11 (2.0) | 856 (2.0) |
   Psoriasis | 146 (26.5) | 10,566 (24.3) |
   Inflammatory bowel diseases | 136 (24.7) | 8,503 (19.5) |
   Ankylosing spondylitis | 8 (1.5) | 625 (1.4) |
   Multiple diseases | 44 (8.0) | 3,894 (8.9) |
Medicationsa | Â | Â |
   TNF antagonists user | 27 (4.9) | 4,186 (9.6) |
   Other biologics user | 0 (0) | 198 (0.5) |
   Conventional DMARDs user | 92 (16.7) | 9,312 (21.4) |
   Oral glucocorticoidsb |  |  |
None | 456 (82.8) | 34,267 (78.7) |
Low | 86 (15.6) | 8,041 (18.5) |
Medium | 7 (1.3) | 902 (2.1) |
High | 2 (0.4) | 354 (0.8) |
Charlson comorbidity index | Â | Â |
   0 | 287 (52.1) | 19,971 (45.8) |
   1 | 181 (32.9) | 16,565 (38.0) |
   ≥ 2 | 83 (15.1) | 7,028 (16.1) |
Inpatient hospitalization | Â | Â |
   No | 466 (84.6) | 36,158 (83.0) |
   Yes | 45 (15.4) | 7,406 (17.0) |
Number of outpatient physician visits | Â | Â |
   0-2 | 83 (15.1) | 8,705 (20.0) |
   3-5 | 227 (41.2) | 16,843 (38.7) |
   6-10 | 185 (33.6) | 13,376 (30.7) |
   11 and more | 54 (9.8) | 4,642 (10.7) |