Subgroups according to BASDAI/ASDAS category (baseline)
| ASDAS≥2.1 | ASDAS<2.1 | Total | |
| BASDAI≥4 | 487 | 4 | 491 |
| BASDAI <4 | 64 | 39 | 103 |
| Total | 551 | 43 | 594* |
*Subgroups according to BASDAI/ASDAS category at baseline in the ‘eligible population’ (ie, treated or not with bDMARD, with complete 6 months of follow-up).
ASDAS, Ankylosing Spondylitis Disease Activity Score; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; bDMARD, biologic disease-modifying antirheumatic drug.