LAUSR

BACKGROUND To investigate the effect of statins on relapse of Takayasu arteritis (TAK), which frequently occurs after achievement of remission. METHODS We conducted a retrospective study on TAK patients with active disease, diagnosed between 2012 and 2017. Relapse was defined as recurrence of active disease after achieving remission. Demographic and clinical parameters of patients who experienced relapse were compared to those who did not. To identify factors associated with relapse, significant factors identified in this comparison were included in a multivariate Cox regression analysis. Inverse probability of treatment weighting (IPTW)-adjusted analysis was used to evaluate the influence of statins on relapse. RESULTS Of the total 74 TAK patients, 40 (54.1%) patients received statins, whereas 34 (45.9%) patients did not. Relapse was observed in 36 (48.6%) patients of the total 74 TAK patients. Compared with patients who did not experience relapse, patients who experienced relapse were younger (44.5 ± 13.5 years vs 34.1 ± 12.6 years, p = 0.001), had lower prevalence of hypertension (63.2% vs 38.9%, p = 0.037), more commonly had carotidynia (7.9% vs 27.8%, p = 0.025), had higher LDL-cholesterol (84.8 ± 18.8 mg/dl vs 100.5 ± 26.1 mg/dl, p = 0.010), and were less commonly taking statins (71.1% vs 36.1%, p = 0.003). The use of statins was significant in multivariate Cox regression analysis (adjusted hazard ratio 0.260, 95% confidence interval 0.120-0.563, p = 0.001). Furthermore, IPTW-adjusted analysis confirmed that statin use was associated with a lower risk of relapse (IPTW-adjusted hazard ratio 0.153, 95% confidence interval 0.038-0.616, p = 0.008). CONCLUSION In TAK, statins can be beneficial in reducing relapse rate after achieving remission.