Zhao M, et al. – An observational study was conducted to evaluate the recurrence probability and the possible predictors in patients with ankylosing spondylitis (AS) from etanercept discontinuation. In AS patients who achieved the ASAS 20 response after receiving the treatment, no association was observed between the time of relapse and the duration of the treatment with etanercept. In addition, the older age and younger onset age of patients appeared to be important factors associated with an increased risk of relapse.