FRI0048 NUMBER NEEDED TO TREAT TO ACHIEVE MINIMUM CLINICALLY SIGNIFICANT DIFFERENCES IN PATIENT-REPORTED OUTCOMES IN PATIENTS TREATED WITH BARICITINIB

Abstract

Background:Baricitinib (BARI) provided rapid and sustained improvements in patient-reported outcomes (PROs) in randomized, controlled trials (RCTs) in patients (pts) with active rheumatoid arthritis (RA) and inadequate responses (IR) to methotrexate (MTX) (RA-BEAM;NCT01710358)1,2and biologic DMARDs (bDMARD-IR; RA-BEACON;NCT01721044)3,4.Objectives:To determine the number needed to treat (NNT) to report improvements ≥minimum clinically important differences (MCIDs) in multiple PROs at Week (Wk) 12 after treatment with BARI 4-mg in RA-BEAM and BARI 2-mg or BARI 4-mg in RA-BEACON. NNTs ≤10 vs placebo (PBO) are considered clinically meaningful.Methods:Evaluated PROs with respective MCID definitions included Patient Global Assessment of Disease Activity (PtGA, 0-100 mm visual analog scale [VAS], MCID ≥10 mm), pain (0-100 mm VAS, MCID ≥10 mm), physical function (Health Assessment Questionnaire-Disability Index, MCID ≥0.22 points), fatigue (Functional Assessment of Chronic Illness Therapy-Fatigue [FACIT-F], MCID≥4.0), and health-related quality of life (SF-36 physical component summary [PCS: MCID ≥2.5] and domain scores: physical function [PF], role physical [RP], bodily pain [BP], general health [GH], vitality [VT], social functioning [SF], role emotional [RE], mental health [MH], MCID ≥5.0).5The percentages of pts reporting improvements ≥MCID were determined at Wk 12. NNTs were calculated as 1/difference in response rates between BARI 2-mg or 4-mg and PBO.Results:At Wk 12, percentages of pts reporting clinically meaningful improvements were greater and statistically different from PBO (p<0.01) with BARI 2-mg and 4-mg across most PROs in both RCTs. Most NNTs were ≤10. (Figure)Conclusion:Across different populations, MTX-IR and bDMARD-IR pts with active RA reported clinically meaningful improvements in PROs after BARI treatment. The NNTs in these analyses indicate that <10 pts need to be treated with BARI 2- or 4-mg to report a clinically meaningful benefit.