ABSTRACT
BackgroundGCA is a critically ischemic large vessel vasculitis, varying in extent, severity and outcomes, hence requires disease stratification using clinical, laboratory and imaging parameters, for targeted management. Although DMARDs are used, the effectiveness in real life, such adjuvants remain un-elucidated. We performed a prospective, multi centre cohort study of new GCA stratified into remitting, relapsing, refractory, ischemic disease.ObjectivesWe assessed prognostic factors and compared critical outcomes such as remission with glucocorticoid (GC) monotherapy versus GC plus DMARDs in the first 12 months.MethodsHAS GCA study (1) recruited consecutive patients with new onset GCA from 7 centres (UK, Italy, Spain, Netherlands). diagnosis was confirmed used a modified GiACTA criteria at 6 months follow up. All underwent ultrasound (bilateral common, parietal, frontal temporal arteries, and axillary arteries) using accepted standard cut-off values [2]. GCA patients had US at baseline,1,3,6,12 months and halo count (HC) and Halo score (Temporal TAHS, axillary AAHS, total THS) assessed [3]. The primary outcome- remission at 12 months (absence of signs/symptoms, CRP<5 mg/dl, prednisolone < 5 mg daily). Results are reported as descriptive statistics.Results229 participants included in the study (GCA- 84 (36.68 %) (Figure 1). Study recruited during Covid pandemic,73 completed,11 lost to follow-up (died -7, withdrawn-4). The deceased/withdrawn patients (compared to completers) were older (80 v74 yrs, p=0.018), preponderantly male (73% v 36%, p=0.043) with visual symptoms (91% v 49%, p=0.010) partial/total sight loss (55% v 21%, p=0.024), lower CRP (21 v 68, p=0.061) and ESR (42 v 62, p= 0.317).Of 73 completers 36 required early DMARDs (<12 weeks) for refractory/relapsing/ischemic/GC related AEs. This group had more LV involvement (50% v 11%, p=0.0003), Remission attained at 12 months 32/36 (89%) in DMARD group was comparable to the remitting GC monotherapy group 33/37 (89%) with comparable cumulative GC doses (Figure 1, Table 1).At 12-months follow up, median TAHS, AAHS and THS reduced from 13 to 3, 12 to 9 and 21.5 to 12, respectively.ConclusionOur study suggests, elderly males with visual symptoms, sight loss, lower CRP are a high-risk group with increased mortality within GCA. Difficult to treat disease is seen in half of all patients especially with LV involvement. This group responds well to early DMARD use achieving remission comparable to the remitting group at 12 months. Current therapies fail to achieve remission in 9.5 % of cases. HS and HC show significant improvement mirroring clinical outcomes during first 12 months of therapy.References[1]Sebastian A et al. BMC Rheum. 2020[2]Schafer VS et al. Rheumatology 2017[3]van der Geest KSM et al. ARD 2020Table 1.comparison between the DMARD-used group and only GC group in all the GCA completed the 12 months follow upPatients' characteristicsGCA with completed follow-up (n=73)GCA treated with DMARD=36GCA not treated with DMARD=37Age, median (range) years73.5 (60-89)76 (60-89)Sex, Females, n (%)23 (64)24 (65)US halo score (HS)/IMT median (range)Temporal artery HS11 (0-23)13 (1-22)Axillary artery HS12 (0-21)12 (0-18)Axillary artery IMT (mm)0.77 (0.33-2.6)0.82 (0.39-1.21)Total HS22.5 (2-41)21 (5-40)Clinical features, n (%)Temporal headache25(69)30 (81)Scalp tenderness17 (47)19 (51)Jaw & Tongue claudication22 (61)24 (65)Polymyalgic symptoms21 (58)13 (35)Constitutional symptoms21 (58)18 (49)Any visual disturbance15 (42)21 (57)Partial or complete vision loss8 (22)7 (19)History of PMR6 (17)3 (8)Exam findings, n (%)Temporal artery abnormality24 (67)30 (81)AION/ CRAO8 (22)6 (16)Ocular nerve palsy1 (3)3 (8)Lab markers at baseline, median (range)CRP mg/dL,72.2 (6.4-292)59 (6-206)ESR mm/hr67 (9-130)57 (2-120)GC treatment, median (range)GC starting dose, (baseline)45 (0-60)50 (0-60)GC dose at 12m,5 (0-25)2.5 (0-10)Cumulative GC dose at 12m4627.5 (2600-10260.5)4622.5 (944-10737.5)Remission with prednisolone dose ≤5 mg at 12m, n (%)32 (89)33 (89)Acknowledgements:NIL.Disclosure of InterestsBhaskar Dasgupta Consultant of: Roche, Chugai, Sanofi, Grant/research support from: Roche, Sanofi, AbbVie, and GlaxoSmithKline, Kornelis van der Geest Speakers bureau: Roche, Grant/research support from: AbbVie, Alessandro Tomelleri: None declared, Pierluigi Macchioni: None declared, Giulia Klinowski: None declared, Carlo Salvarani: None declared, Abdul Kayani: None declared, Mohammad Tariq: None declared, Diana Prieto-Peña: None declared, Edoardo Conticini: None declared, Muhammad Khurshid: None declared, Sue Inness: None declared, Jo Jackson: None declared, Alwin Sebastian: None declared.