In the original article entitled "Real-World Effectiveness and Treatment Retention of Secukinumab in Patients with Psoriatic Arthritis and Axial Spondyloarthritis: A Descriptive Observational Analysis of the Spanish BIOBADASER Registry", the legend for Supplementary Fig. 2B included a typo in the colors. The legend for Supplementary Fig. 2B should have appeared as shown below:

In addition, the order of the colors and items in the legends of Supplementary Figs. 4 and 5B has been modified.

The wrong Supplementary file that was originally published with this article has now been replaced with the correct file.