This paper is an interesting companion piece to the recently published 5-year follow-up of the CoBalT trial (Wiles et al, 2016), which I blogged about for The Mental Elf here. Both papers are based on trials of talking therapies in comparison to treatment-as-usual (TAU) for people with treatment-resistant depression, and both studies were set up to look at depression and mental wellbeing for several years post-treatment.