Association of Folate Level in Blood with the Risk of Schizophrenia

作者：Ding, Yujie; Ju, Mingliang; He, Lin; Chen, Wenzhong^*

来源：Combinatorial Chemistry & High Throughput Screening, 2017, 20(2): 116-122.

DOI：10.2174/1386207320666170117120828

• Folate
• schizophrenia
• meta-analysis
• case-control study
• folic acid
• neurodevelopmental disorders

Aim and Objective: The aim of this study was to evaluate the association between folate level and the risk of schizophrenia and to identify possible biomarker for schizophrenia.
Materials and Methods: Data about folate were extracted from 16 high quality studies. The association of folate level in blood and schizophrenia was evaluated using standardized mean difference (SMD) and 95% confidence interval (CI).
Results: Totally 1183 (52.1%) cases and 1089 (47.9%) controls were included in the current meta-analysis. Folate level in schizophrenia patients was significantly lower than that in healthy controls (SMD= -0.65; 95% CI: [-0.86, -0.45]; P < 0.00001). Subgroup analysis demonstrated that the decreased folate level was found in both Asian and European patients (SMD=-0.86, P < 0.00001; SMD=-0.44, P < 0.00001, respectively), while there were no significant differences in patients from other areas (P > 0.05). Sensitivity analysis confirmed that these results were stable and reliable, no publication bias existed in our meta-analysis based on Egger's and Begg's tests (P=0.48 and 0.30, respectively).
Conclusion: These results suggest that decreased folate may be a risk factor for schizophrenia. More epidemiological and biochemistry studies are required to describe how folate or folate supplementation play roles in the progress of schizophrenia.

• 出版日期2017
• 单位上海市精神卫生中心; 上海交通大学