MethodsA comprehensive search of ClinicalTrials.gov was performed on the 26 April 2025 (see Figure 1). Trials were included if they met the following eligibility criteria: (1) interventional study design; (2) availability of published results on ClinicalTrials.gov; (3) a primary investigational focus on schizophrenia; and (4) classification as a phase 2, phase 3, or phase 4 clinical trial. For each eligible trial, data were extracted on the National Clinical Trial (NCT) identifier, total sample size, study site location, and participant demographic characteristics, including age, sex, race, and ethnicity.
Disclosure of InterestA. Kwaśny Grant / Research support from: Beckley Psytech, Compass Pathways, GH Research, MSD., D. Świeczkowski: None Declared, A. Włodarczyk Grant / Research support from: Karuna Therapeutics., A. Wilkowska Grant / Research support from: Angelini, Biogen, Eli Lilly and Company, Janssen-Cilag, Lundbeck, Polpharma, Sanofi, and Valeant., J. Słupski Grant / Research support from: Actavis, Eli Lilly, Minerva Neurosciences, Sunovion Pharmaceuticals, KCR, Janssen, Otsuka, Apodemus, Cortexyme, MSD, Novartis, Ketabon HMNC Brain Health, Acadia and Karuna Therapeutics., W. Cubała Grant / Research support from: Grants: Acadia, Alkermes, Allergan, Angelini, Auspex Pharmaceuticals, Beckley Psytech, BMS, Celon, Cephalon, Compass Pathways, Cortexyme, Ferrier, Forest Laboratories, GedeonRichter, GH Research, GWPharmaceuticals, HMNC Brain Health, IntraCellular Therapies, Janssen, KCR, Lilly, Lundbeck, Minerva, MSD, NIH, Neumora, Novartis, Orion, Otsuka, Recognify Life Sciences, Sanofi, Servier Honoraria: Adamed, Angelini, AstraZeneca, BMS, Celon, GH Research, GSK, Janssen, KRKA, Lekam, Lundbeck, Minerva, NeuroCog, Novartis, Orion, Pfizer, Polfa Tarchomin, Sanofi, Servier, Zentiva, Consultant of: Advisory boards: Angelini, Celon (ended 2021), Douglas Pharmaceuticals, GH Research, Janssen, MSD, Novartis, Polpharma, Sanofi