Abstract
Mood disorders, such as anxiety and depression, are extremely prevalent among patients with rheumatoid arthritis (RA). In this study, we assessed the impact of treatment with tocilizumab (TCZ), an IL-6 antagonist, upon anxiety and depressive symptoms in a cohort of RA patients. Study participants were adults diagnosed with RA who received a weekly subcutaneous injection of tocilizumab for 24weeks. We used the Hamilton Depression (HDRS) and Anxiety (HAMA) scores in order to assess the severity of depression and anxiety, respectively. RA disease activity indices and depression and anxiety levels were assessed at baseline, 4weeks and study completion. Ultimately, 91 patients were included in the study. The mean age was 54years, and the majority were female (79%). The mean score in all disease activity indices as well as depression and anxiety levels decreased dramatically from baseline to study completion. Sixty patients (66%) demonstrated a significant decrease in anxiety and/or depression levels. When logistic regression was performed, an HDRS score indicative of depression at study baseline demonstrated an independent association with a significant psychiatric response whilst older age and increased baseline weight were negatively associated. HAMA and HDRA scores correlated with the following RA disease activity parameters, respectively; HAQ-DI (r=.4, .42), DAS28 (r=.29, .32) and CDAI (0.28 and 0.33), all of them were statistically significant (P<.01). This study has demonstrated a favourable impact of TCZ therapy on parameters reflecting depression and anxiety severity in patients with RA.
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