“…Participants for this study were recruited from the 522 patients that were included in the second cohort (TIRA-2) of the prospective multi-centre early arthritis project with the Swedish acronym TIRA [5,22] during 2006-2009. At inclusion, at 3, 6 and 12 months after inclusion in the TIRA study, and thereafter yearly, information concerning disease activity, disability, genetics, and on going disease modifying anti-rheumatic drugs were recorded.…”