ASAS 20/40 responses in anti-TNF-naïve and anti-TNF-IR subjects at weeks 52, 104 and 156. ASAS 20/40 responses in anti-TNF-naïve and anti-TNF-IR subjects at weeks 52, 104 and 156. Data are shown as observed through week 156. ASAS 20/40, Assessment of Spondyloarthritis International Society criteria for 20%/40% improvement; IR, inadequate response; n, number of evaluable subjects; TNF, tumour necrosis factor. Helena Marzo-Ortega et al. RMD Open 2017;3:e000592 Copyright © BMJ Publishing Group & EULAR. All rights reserved.