Daily use of high-potency cannabis is associated with more positive symptoms in first-episode psychosis patients: the EU-GEI case-control study

Quattrone, D; Ferraro, L; Tripoli, G; La Cascia, C; Quigley, H; Quattrone, A; Jongsma, HE; Del Peschio, S; Gatto, G; Gayer-Anderson, C; Jones, PB; Kirkbride, JB; La Barbera, D; Tarricone, I; Berardi, D; Tosato, S; Lasalvia, A; Szoke, A; Arango, C; Bernardo, M; Bobes, J; Del Ben, CM; Menezes, PR; Llorca, PM; Santos, JL; Sanjuan, J; Tortelli, A; Velthorst, E; de Haan, L; Rutten, BPF; Lynskey, MT; Freeman, TP; Sham, PC; Cardno, AG; Vassos, E; van Os, J; Morgan, C; Reininghaus, U; Lewis, CM; Murray, RM; Di Forti, M

Quattrone, D (corresponding author), Kings Coll London, Inst Psychiat Psychol & Neurosci, Social Genet & Dev Psychiat Ctr, London SE5 8AF, England.; Quattrone, D (corresponding author), Kings Coll London, South London & Maudsley NHS Fdn Trust, Natl Inst Hlth Res NIHR, Maudsley Biomed Res Ctr, London, England.; Quattrone, D (corresponding author), Heidelberg Univ, Med Fac Mannheim, Cent Inst Mental Hlth, Mannheim, Germany.

PSYCHOLOGICAL MEDICINE, 2021; 51 (8): 1329

Abstract

Background Daily use of high-potency cannabis has been reported to carry a high risk for developing a psychotic disorder. However, the evidence is mix......

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