THU0302 Survival of disease-modifying drugs (DMARD) in patients with recent diagnosis of psoriatic arthritis in daily clinical practice

Background Psoriatic arthritis (PsA) is a chronic inflammatory disease that benefits from DMARDs, in this regard knowing more about these therapies is a great step forward in the management of these patients in daily clinical practice. Objectives To evaluate the survival of DMARDs used in recent diagnose PsA patients as well as the causes of discontinuation and to analyse the possible associated factors. Methods Retrospective longitudinal observational study. Subjects: Inception cohort of patients from January 2010 to , December 2014 and followed up to December 2016, diagnosed with PsA according to ICD-10 code. Main outcome: discontinuation of conventional synthetic DMARDs (csDMARDs) and biological originator DMARDs (boDMARDs) due to: Adverse drug reactions (ADRs); Improvement or remission; Inefficacy; Patient`s decision and Physician’s decision. Covariables: sociodemographic and clinical. Statistical analysis: To estimate DMARDs discontinuation rates, survival techniques were used, expressing the incidence rate (IR) per 100 patients*year with their respective CI at 95%. Multivarite Cox regression models were performed to analyse the factors associated with DMARDs discontinuation and the results were expressed in Hazard ratio (HR) and 95% CI. Results 191 patients with recent diagnosis of PsA were included, with a 379.70 Patients*year follow-up. 50.3% were male, the mean age at diagnosis was 50±14.6 years old. 46.6% of the patients had a history of cutaneous psoriasis. The HLA-B27 was positive in 20% of patients. 50% of the patients started a DMARDs at the first visit. Throughout the follow-up, all patients received csDMARDs and 23 used boDMARDs. The median DMARD per patient was 2[.1–3 Methotrexate (MTX) was the most used drug 69.7%. According to the treatment regimen, 30% were on combination therapy, the most frequent was antiTNF +MTX (33%). 103 discontinuations were recorded with a IR 27.13 [22.36–32.90] within these, 44 were related with ADRs (IR 11.59 [8.62–15.57]), 24 (IR 6.32 [3.58–11.13]) were due to inefficiency, 9 (IR 2.37 [1.23–4.55]) were registered after remission, 12 (IR 3.16 [1.79–5.56]) by decision of the patient and 12 (IR 3.16 [1.79–5.56]) by doctor’s decision. The DMARDs median survival was 1.8 years [1.4–2.7]. Table 1 shows the discontinuation rates for each type of DMARDs and the multivariate analysis for the factors associeted with DMARDs discontinuation is in table 2. Table 1 Conclusions In our study, the DMARD discontinuation rate was 27.13, mainly related with ADRs. We have also found some psychological, clinical and therapy regimen factors that can modify the DMARDs survival on PsA. We observed that MTX, presented the longest survival independent of the rest of the factors. Disclosure of Interest None declared