Percentage of flares during the pre-COVID-19 and post-COVID-19 vaccination periods
| Follow-up time (years or months) | Rheumatoid arthritis | Psoriatic arthritis | |||||
| Patients (n)* | Flares (n) | % | Patients (n)* | Flares (n) | % | ||
| Prevaccination | 1 | 712 | 104 | 14.6 | 354 | 45 | 12.7 |
| From 12th month to 6th month prior to vaccination | 317 | 32 | 10.1 | 166 | 19 | 11.4 | |
| From 6th month to vaccination date | 570 | 72 | 12.6 | 264 | 27 | 10.2 | |
| From 6th month to 3rd month prior to vaccination | 199 | 26 | 13.0 | 83 | 10 | 12.0 | |
| From 3rd month to vaccination date | 359 | 46 | 12.8 | 172 | 17 | 9.8 | |
| Post vaccination | At 6 months post vaccination | 593 | 84 | 14.2 | 253 | 25 | 9.9 |
| From time to vaccination to 3rd month | 410 | 52 | 12.7 | 178 | 18 | 10.1 | |
| From 3rd to 6th month post vaccination | 231 | 32 | 14.2 | 86 | 7 | 8.1 | |
Thick line indicates the time of COVID-19 vaccination.
*Number of patients in each period who had at least one prior review.