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The relationship between obesity and neurocognitive function in Chinese patients with schizophrenia.

Abstract：

BACKGROUND:Studies have reported that up to 60% of individuals with schizophrenia are overweight or obese. This study explored the relationship between obesity and cognitive performance in Chinese patients with schizophrenia. METHODS:Outpatients with schizophrenia aged 18-50 years were recruited from 10 study sites across China. Demographic and clinical information was collected. A neuropsychological battery including tests of attention, processing speed, learning/memory, and executive functioning was used to assess cognitive function, and these 4 individual domains were transformed into a neurocognitive composite z score. In addition, height and weight were measured to calculate body mass index (BMI). Patients were categorized into 4 groups (underweight, normal weight, overweight and obese) based on BMI cutoff values for Asian populations recommended by the World Health Organization. RESULTS:A total number of 896 patients were enrolled into the study. Fifty-four percent of participants were overweight or obese. A higher BMI was significantly associated with lower scores on the Wechsler Memory Scale-Revised (WMS-R) Visual Reproduction subscale, the Wechsler Adult Intelligence Scale-Revised (WAIS-R) Digit Symbol subscale, and the composite z score (p's ≤ 0.024). Obese patients with schizophrenia had significantly lower scores than normal weight patients on the Trail Making Test B, the WMS-R Visual Reproduction subscale, the WAIS Digit Symbol subscale, and the composite z score (p's ≤ 0.004). CONCLUSIONS:Our study suggests that, in addition to its well established risk for various cardiometabolic conditions, obesity is also associated with decreased cognitive function in Chinese patients with schizophrenia. Future studies should explore if weight loss and management can improve cognitive function in obese patients who suffer from schizophrenia.

journal_name

BMC Psychiatry

journal_title

BMC psychiatry

authors

Guo X,Zhang Z,Wei Q,Lv H,Wu R,Zhao J

doi

10.1186/1471-244X-13-109

subject

Has Abstract

pub_date

2013-04-09 00:00:00

pages

109

issn

1471-244X

pii

1471-244X-13-109

journal_volume

13

pub_type

杂志文章

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