Abstract
To evaluate whether accelerated brain aging occurs in individuals with mood or psychotic disorders. A systematic review following PRISMA guidelines was conducted. A meta-analysis was then performed to assess neuroimaging-derived brain age gap in three independent groups: (1) schizophrenia and first-episode psychosis, (2) major depressive disorder, and (3) bipolar disorder. A total of 18 papers were included. The random-effects model meta-analysis showed a significantly increased neuroimaging-derived brain age gap relative to age-matched controls for the three major psychiatric disorders, with schizophrenia (3.08; 95%CI [2.32; 3.85]; p<0.01) presenting the largest effect, followed by bipolar disorder (1.93; [0.53; 3.34]; p<0.01) and major depressive disorder (1.12; [0.41; 1.83]; p<0.01). The brain age gap was larger in older compared to younger individuals. Individuals with mood and psychotic disorders may undergo a process of accelerated brain aging reflected in patterns captured by neuroimaging data. The brain age gap tends to be more pronounced in older individuals, indicating a possible cumulative biological effect of illness burden.
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