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Background/Aims To assess the potential for whole-body MRI (WBMRI) to modify rheumatologists’ impression of disease activity and treatment management in adolescent patients with JIA. Methods Two rheumatology consultants experienced in managing people with JIA reviewed anonymised clinical data from an opportunistic sample of 30 patients with JIA (aged 15-24), not under their care. The cohort were clinically assessed by a senior rheumatology fellow before undergoing a research WBMRI scan, reported for musculoskeletal inflammation by a radiologist blinded to clinical information. The clinical findings and patient-reported outcomes recorded on that visit, alongside the patients’ present and past treatments, imaging and laboratory results were included in the clinical summaries examined by each rheumatologist. They then independently rated their impression of disease activity (See Table 1) and documented their resulting treatment recommendations per patient, in a two-stage approach. The first stage data analysis did not include the WBMRI reports. In stage two, the rheumatologists re-rated disease activity and treatment suggestions in light of WBMRI findings. The responses without and with the WBMRI findings were compared for each consultant and between them. Results Disease activity ratings were changed after reviewing the WBMRI reports in 16/30 and 17/30 patients by the rheumatologist A and B respectively. The activity category (‘active’ to ‘inactive’ or vice versa) changed in 7/16 and 4/17 cases, respectively. The certainty in the activity status increased for both rating clinicians (from ‘likely’ to ‘definitely’ in the same category or from ‘not sure’ to any other category) in 7/16 and 11/17 cases, respectively, whilst decreased for both in two cases. Disease activity assessments and treatment recommendations with and without WBMRI, are summarised in Table 1. Inter-rater agreement without and with WBMRI regarding disease activity (active/inactive) was 84.00% and 82.1% respectively, and regarding the intention to change treatment (yes/no) was 63.3% and 83.3%, respectively. Conclusion WBMRI scan findings changed the rheumatologists’ impression or level of certainty regarding disease activity in about half the patients and treatment plan in about one-third. Therefore, a larger study involving a greater number of rheumatologists across the country, should be considered to validate these results. Disclosure V. Choida: None. R.S. Tattersall: None. J.J. Manson: None. D. Sen: None. C. Ciurtin: None. M.A. Hall-Craggs: None.

rheumatology

P159 The potential impact of whole-body MRI on the rheumatologists’ disease activity assessment and treatment plan for patients with juvenile idiopathic arthritis