Christopher Rayner, Jonathan R. I. Coleman, Kirstin L. Purves, John Hodsoll, Kimberley Goldsmith, Georg W. Alpers, Evelyn Andersson, Volker Arolt, Julia Boberg, Susan Bögels, Cathy Creswell, Peter Cooper, Charles Curtis, Jürgen Deckert, Katharina Domschke, Samir El Alaoui, Lydia Fehm, Thomas Fydrich, Alexander L. Gerlach, Anja Grocholewski, Kurt Hahlweg, Alfons Hamm, Erik Hedman, Einar R. Heiervang, Jennifer L. Hudson, Peter Jöhren, Robert Keers, Tilo Kircher, Thomas Lang, Catharina Lavebratt, Sang-hyuck Lee, Kathryn J. Lester, Nils Lindefors, Jürgen Margraf, Maaike Nauta, Christiane A. Pané-Farré, Paul Pauli, Ronald M. Rapee, Andreas Reif, Winfried Rief, Susanna Roberts, Martin Schalling, Silvia Schneider, Wendy K. Silverman, Andreas Ströhle, Tobias Teismann, Mikael Thastum, Andre Wannemüller, Heike Weber, Hans-Ulrich Wittchen, Christiane Wolf, Christian Rück, Gerome Breen, Thalia C. Eley

• Major depressive disorder and the anxiety disorders are highly prevalent, disabling and moderately heritable. Depression and anxiety are also highly comorbid and have a strong genetic correlation (r(g) approximate to 1). Cognitive behavioural therapy is a leading evidence-based treatment but has variable outcomes. Currently, there are no strong predictors of outcome. Therapygenetics research aims to identify genetic predictors of prognosis following therapy. We performed genome-wide association meta-analyses of symptoms following cognitiveMajor depressive disorder and the anxiety disorders are highly prevalent, disabling and moderately heritable. Depression and anxiety are also highly comorbid and have a strong genetic correlation (r(g) approximate to 1). Cognitive behavioural therapy is a leading evidence-based treatment but has variable outcomes. Currently, there are no strong predictors of outcome. Therapygenetics research aims to identify genetic predictors of prognosis following therapy. We performed genome-wide association meta-analyses of symptoms following cognitive behavioural therapy in adults with anxiety disorders (n = 972), adults with major depressive disorder (n = 832) and children with anxiety disorders (n = 920; meta-analysis n = 2724). We (h(SNP)(2)) and polygenic scoring was used to examine genetic associations between therapy outcomes and psychopathology, personality and estimated the variance in therapy outcomes that could be explained by common genetic variants learning. No single nucleotide polymorphisms were strongly associated with treatment outcomes. No significant estimate of h(SNP)(2) could be obtained, suggesting the heritability of therapy outcome is smaller than our analysis was powered to detect. Polygenic scoring failed to detect genetic overlap between therapy outcome and psychopathology, personality or learning. This study is the largest therapygenetics study to date. Results are consistent with previous, similarly powered genome-wide association studies of complex traits.…