Association Between Janus Kinase Inhibitors Therapy and Mental Health Outcome in Rheumatoid Arthritis: A Systematic Review and Meta-analysis

Abstract

Introduction: Rheumatoid arthritis (RA) is a chronic debilitating illness, usually associated with mental health ailments. Literature reports contradictory observations about the association between recent RA pharmacotherapies and mental health. We systematically reviewed RA randomized control trials to synthesize the association between Janus kinases (JAK) inhibitors therapy and mental health. Methods: We systematically searched clinical trials of JAK inhibitor intervention reporting mental health outcomes using short form-36 (SF-36) in PubMed, Embase, and Scopus databases from inception to February 2021. We have selected the studies and extracted the data, adhering to Preferred Reporting Items of Systematic reviews and Meta-Analysis (PRISMA) guidelines. We have pooled the mean change of SF-36 mental component score (MCS) between JAK inhibitors and comparator therapy with a 95% confidence interval. Results: Of the 2915 searched studies for systematic review, 19 studies involving 14,323 individuals were included for the meta-analysis. The pooled mean reduction in SF-36 MCS scores (after minus before) with JAK inhibitors was 4.95 (4.41–5.48). The pooled mean difference of incremental mean change in SF-36 MCS score between JAK monotherapy and comparator was 1.53 (0.88–2.18). The improvement in SF-36 MCS scores with JAK inhibitor therapy is greater than the minimum clinically important difference (MCID) value of 2.5. However, on separate analysis with comparator drugs like methotrexate and standard treatment, the MCS scores did not exceeded the MCID value and were also not statistically significant. Conclusions: JAK inhibitors results in clinically meaningful improvement in the mental health scores of the RA patients. PROSPERO Registration ID: 2021 CRD42021234466.