Daniela Hubl, Hidenori Yamasue, Jan Ivar Røssberg, Christina Wenneberg, Cali F. Bartholomeusz, Tina Dam Kristensen, Paolo Fusar-Poli, Peter Bachman, Jessica A. Turner, Naoyuki Katagiri, Daiki Sasabayashi, Stefan Borgwardt, Dorte Nordholm, Michael W. L. Chee, Daniel H. Mathalon, Mathew A. Harris, Alison R. Yung, Sophia Vinogradov, Maria Jalbrzikowski, Mikkel E. Sørensen, Jayachandra Mitta Raghava, Franz Resch, Bjørn H Ebdrup, Therese van Amelsvoort, Paul M. Thompson, Rachel Loewy, Anastasia Theodoridou, Christine I. Hooker, Christian K. Tamnes, Rebecca Cooper, Masafumi Mizuno, Shinsuke Koike, Cheryl M. Corcoran, Maria A. Omelchenko, Florian Schlagenhauf, Michio Suzuki, Dennis Hernaus, Kang Ik K. Cho, Jordina Tor, Irina Lebedeva, Alex Koppel, Jinsong Tang, Lukasz Smigielski, Ole A. Andreassen, Lieuwe de Haan, Dean F. Salisbury, Birte Glenthøj, Yoo Bin Kwak, Tor Gunnar Værnes, Peter J. Uhlhaas, Adriana Fortea, Rebecca A. Hayes, Brian J. Roach, Lars T. Westlye, Inmaculada Baeza, Esther Via, Louise Birkedal Glenthøj, Patrick D. McGorry, Ingrid Agartz, Kimberley Atkinson, Kristen M. Haut, Mallory J Klaunig, Tsutomu Takahashi, Helen Baldwin, Chantal Michel, Gisela Sugranyes, Romina Mizrahi, James A. Waltz, Juan Zhou, Francisco Reyes-Madrigal, Jason Schiffman, Liu Yuan, G. Paul Amminger, Camilo de la Fuente-Sandoval, Theo G.M. van Erp, Jose C. Pariente, Dennis Velakoulis, Merete Nordentoft, Karsten Heekeren, Ying He, Minah Kim, Jochen Kindler, Ulrich Schall, Montserrat Dolz, Sabrina Catalano, Michael Kaess, Tomas Moncada-Habib, Wenche ten Velden Hegelstad, Wu Jeong Hwang, Jun Soo Kwon, Daniel Muñoz-Samons, André Schmidt, Holly K. Hamilton, Tiziano Colibazzi, Stephen J. Wood, Philip McGuire, Lijun Ouyang, Ashleigh Lin, Paul E. Rasser, Kiyoto Kasai, Wulf Rössler, Alexander Tomyshev, Vanessa Cropley, Shalaila S. Haas, Xiaoqian Ma, Pablo León-Ortiz, Ketil Oppedal, Paul Møller, Xiaogang Chen, Barnaby Nelson, Gloria D. Venegoni, Paul Allen, Christos Pantelis, Imke Lemmers-Jansen, Jimmy Chee Keong Lee, Takahiro Nemoto, Stephen M. Lawrie, Andreas Heinz, Clinical Developmental Psychology, APH - Mental Health, Cognitive Psychology, Adult Psychiatry, ANS - Complex Trait Genetics, ANS - Mood, Anxiety, Psychosis, Stress & Sleep, Lee Kong Chian School of Medicine (LKCMedicine), Psychiatrie & Neuropsychologie, RS: MHeNs - R2 - Mental Health, and MUMC+: MA Med Staf Spec Psychiatrie (9)
IMPORTANCE The ENIGMA clinical high risk (CHR) for psychosis initiative, the largest pooled neuroimaging sample of individuals at CHR to date, aims to discover robust neurobiological markers of psychosis risk.OBJECTIVE To investigate baseline structural neuroimaging differences between individuals at CHR and healthy controls as well as between participants at CHR who later developed a psychotic disorder (CHR-PS+) and those who did not (CHR-PS-).DESIGN, SETTING, AND PARTICIPANTS In this case-control study, baseline T1-weighted magnetic resonance imaging (MRI) data were pooled from 31 international sites participating in the ENIGMA Clinical High Risk for Psychosis Working Group. CHR status was assessed using the Comprehensive Assessment of At-Risk Mental States or Structured Interview for Prodromal Syndromes. MRI scans were processed using harmonized protocols and analyzed within a mega-analysis and meta-analysis framework from January to October 2020.MAIN OUTCOMES AND MEASURES Measures of regional cortical thickness (CT), surface area, and subcortical volumes were extracted from T1-weighted MRI scans. Independent variables were group (CHR group vs control group) and conversion status (CHR-PS+ group vs CHR-PS- group vs control group).RESULTS Of the 3169 included participants, 1428 (45.1%) were female, and the mean (SD; range) age was 21.1 (4.9; 9.5-39.9) years. This study included 1792 individuals at CHR and 1377 healthy controls. Using longitudinal clinical information, 253 in the CHR-PS+ group, 1234 in the CHR-PS- group, and 305 at CHR without follow-up data were identified. Compared with healthy controls, individuals at CHR exhibited widespread lower CT measures (mean [range] Cohen d = -0.13 [-0.17 to -0.09]), but not surface area or subcortical volume. Lower CT measures in the fusiform, superior temporal, and paracentral regions were associated with psychosis conversion (mean Cohen d = -0.22; 95% CI, -0.35 to 0.10). Among healthy controls, compared with those in the CHR-PS+ group, age showed a stronger negative association with left fusiform CT measures (F = 9.8; P < .001; q < .001) and left paracentral CT measures (F = 5.9; P = .005; q = .02). Effect sizes representing lower CT associated with psychosis conversion resembled patterns of CT differences observed in ENIGMA studies of schizophrenia (rho = 0.35; 95% CI, 0.12 to 0.55; P = .004) and individuals with 22q11.2 microdeletion syndrome and a psychotic disorder diagnosis (rho = 0.43; 95% CI, 0.20 to 0.61; P = .001).CONCLUSIONS AND RELEVANCE This study provides evidence for widespread subtle, lower CT measures in individuals at CHR. The pattern of CT measure differences in those in the CHR-PS+ group was similar to those reported in other large-scale investigations of psychosis. Additionally, a subset of these regions displayed abnormal age associations. Widespread disruptions in CT coupled with abnormal age associations in those at CHR may point to disruptions in postnatal brain developmental processes.Question How are brain morphometric features associated with later psychosis conversion in individuals at clinical high risk (CHR) for developing psychosis?Findings In this case-control study including 3169 participants, lower cortical thickness, but not cortical surface area or subcortical volume, was more pronounced in individuals at CHR in a manner highly consistent with thinner cortex in individuals with established psychosis. Regions that displayed lower cortical thickness in individuals at CHR who later developed a psychotic disorder additionally displayed abnormal associations with age.Meaning In this study, CHR status and later transition to psychosis was robustly associated with lower cortical thickness; abnormal age associations and specificity to cortical thickness may point to aberrant postnatal brain development in individuals at CHR, including pruning and myelination.This case-control study investigates baseline structural magnetic resonance imaging (MRI) differences between individuals at clinical high risk and healthy controls as well as between participants at clinical high risk who later developed a psychotic disorder and those who did not.