Post-traumatic stress disorder prior to diagnosis is as rare in spondyloarthritis as in non-inflammatory rheumatic conditions and rheumatoid arthritis

Post-traumatic stress disorder (PTSD) may be a risk factor for the development of rheumatoid arthritis (RA). No data are available in spondyloarthritis (SpA). The aim of the present study was to investigate the frequency of traumatic events and PTSD in patients with SpA and its different phenotypes and to compare the results to patients with non inflammatory rheumatic disease and RA patients. This was an observational, cross-sectional and bi-centric study. Participants were patients diagnosed with SpA, non-inflammatory rheumatic or autoimmune disease (controls), or RA. Traumatic events were identified by the brief trauma questionnaire (BTQ). PTSD was defined as the presence of a traumatic event and ≥4 symptoms on the short PTSD checklist scale. Among 1389 participants, 510 patients were diagnosed with SpA (167 ankylosing spondylitis, 140 psoriatic arthritis, 130 non-radiographic-axial SpA, and 51 peripheral SpA), 365 with non-inflammatory rheumatic disease and 514 patients with RA. The frequency of trauma in SPA patients was 33.7%, of which 30.5% in AS, 30.7% in PsA, 37.7% in nr-axSpA and 41.2% in peripheral SpA (P = NS). The prevalence of PTSD in SPA patients was 4.9%, (of which 3.6% in AS, 2.9% in PsA, 6.2% in nr-axSpA and 7.8% in peripheral SpA [P = NS]) and was not significantly different from the controls (after IPTW 4.8% vs. 6.7%). The frequency of trauma and PTSD was also comparable between RA and controls and between SPA and RA. Traumatic events and PTSD occurring prior to diagnosis is as rare in SpA as in non-inflammatory rheumatic diseases and RA.