P140 Validation of EULAR/ACR 2019 classification criteria for SLE in a south Indian juvenile SLE cohort

Abstract Background To date there is no specific classification criteria for juvenile systemic lupus erythematosus (jSLE). Our aim is to compare the real world performance of EULAR/ACR 2019 criteria when applied to a known cohort of jSLE cases in Kerala, India. Methods We retrospectively reviewed the electronic medical record of all patients (n = 735), admitted under the Pediatric Rheumatology Department, Amrita Institute of Medical Sciences, Kochi, a tertiary care center in Kerala, India, during the period January 2012 to June 2019. 107 patients were diagnosed with jSLE by a qualified experienced pediatric rheumatologist and were independently assessed by an adult rheumatologist. Every sixth patient of the remaining 628 patients were selected as the control (n = 105). Patients were excluded if the diagnosis was uncertain or, if there was an overlap with jSLE. Each patient was evaluated to see if he or she satisfied the ACR-1997, SLICC-2012, or EULAR/ACR- 2019 criteria. Results Female: male ratio in cases and controls was 4.1:1 and 2.4 :1 respectively. Mean age for cases and controls was 12.6 +/-2.9 and 11.8 +/-3.5 respectively. The comparison of performance of each criterion is shown in table 1. Table 1: Validation of the EULAR/ACR 2019 SLE classification criteria using clinically diagnosed 107 jSLE cases. ACR- American College of Rheumatology; EULAR- European League Against Rheumatism; SLICC-Systemic Lupus International Collaborating Clinics; PPV- positive predictive value; NPV- negative predictive value Conclusion The new EULAR/ACR 2019 criteria achieved sensitivity, specificity, PPV, NPV and accuracy greater than SLICC 2012 criteria. It also achieved sensitivity, NPV and accuracy greater than 1997 ACR criteria. Disclosures H. Bhaskaran Nair None. S. Balan None.