Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

The Bidirectional Relationship between Weight Gain and Cognitive Function in First-Episode Schizophrenia: A Longitudinal Study in China

Version 1 : Received: 28 February 2024 / Approved: 29 February 2024 / Online: 29 February 2024 (09:51:16 CET)

A peer-reviewed article of this Preprint also exists.

Ma, K.; Zhou, T.; Pu, C.; Cheng, Z.; Han, X.; Yang, L.; Yu, X. The Bidirectional Relationship between Weight Gain and Cognitive Function in First-Episode Schizophrenia: A Longitudinal Study in China. Brain Sci. 2024, 14, 310. Ma, K.; Zhou, T.; Pu, C.; Cheng, Z.; Han, X.; Yang, L.; Yu, X. The Bidirectional Relationship between Weight Gain and Cognitive Function in First-Episode Schizophrenia: A Longitudinal Study in China. Brain Sci. 2024, 14, 310.

Abstract

In patients with schizophrenia, metabolic syndrome is associated with cognitive impairments. We carried out a second analysis of data from a longitudinal trial to examine the relationship between weight gain and cognitive function in patients with first-episode schizophrenia (FES) over the first 6-month antipsychotic treatment. Baseline and 6-month endpoint measurements were taken for both cognitive function and body weight. Linear and logistic regression analyses were applied to investigate the bidirectional relationship between weight gain and cognitive function. Clinically relevant weight gain (CRW) was defined as an increase in body weight ex-ceeding 7%. The final analysis included 337 participants. Lower baseline scores in processing speed (OR=0.837, p=0.007), working memory and attention (OR=0.889, p=0.043), and executive function (OR=0.863, p=0.006) domains were significantly associated with CRW at the 6-month endpoint. After adjusting for confounders, CRW was found to be associated with improvement in the Brief Visuospatial Memory Test (p=0.036). The findings suggest that patients with lower baseline cognitive performance experienced more substantial weight gain. Conversely, weight gain was correlated with cognitive improvements, particularly in the domain of visual learning and memory. This suggested a potential bidirectional relationship between weight gain and cog-nitive function in patients with first-episode schizophrenia.

Keywords

schizophrenia; weight gain; cognitive function; first episode; China

Subject

Medicine and Pharmacology, Psychiatry and Mental Health

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