title: Various effects of antipsychotics on P50 sensory gating in Chinese schizophrenia patients: a meta-analysis.
abstract: BACKGROUND
  The aim of this study was to conduct a meta-analysis so we could evaluate the impact of antipsychotics on the P50 ratio in Chinese schizophrenia patients.
  
  
  METHODS
  Data were collected from the following databases: PubMed, China Biological Medicine Database, China National Knowledge Infrastructure, Cochrane Library and Elsevier Science Direct, with the latest report up to May 2011. An effect size with a 95% confidence interval (CI) was used to assess the strength of various effects of antipsychotics on P50 ratio in the patients.
  
  
  RESULTS
  A total of six studies including 315 and 285 schizophrenia patients at the baseline and endpoint, respectively. Overall, no significant effect of these medicines on the P50 ratio was found (overall effect z=1.03, p=0.30; heterogeneity: Chi2=2.81, df=8, p=0.95, I2=0%). In subgroup analysis by drug, we did not find any significant effects on P50 ratio in either first-generation antipsychotics (effect z=0.92, p=0.36; heterogeneity: Chi2=0.00, df=1, p=0.98, I2=0%) or second-generation antipsychotics (effect z=0.55, p=0.58; heterogeneity: Chi2=2.38, df=5, p=0.79, I2=0%).
  
  
  CONCLUSIONS
  Our meta-analysis suggests that neither the first-generation nor the second-generation antipsychotics had any significant effects on P50 ratio in Chinese patients with schizophrenia.
authors.affiliation: Department of Psychiatry, Huashan Hospital, Fudan University, School of Medicine, Shanghai, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Su
authors.forename: Yiyun
authors.initials: Y
authors.lastname: Cai
authors.forename: Liwei
authors.initials: L
authors.lastname: Wang
authors.forename: Shenxun
authors.initials: S
authors.lastname: Shi
mesh_terms: D014150:Antipsychotic Agents / Q000627:therapeutic use*; D044466:Asian People / Q000523:psychology*; D001921:Brain / Q000187:drug effects / Q000503:physiopathology; D005072:Evoked Potentials, Auditory / Q000187:drug effects* / Q000502:physiology; D006801:Humans; D012559:Schizophrenia / Q000188:drug therapy* / Q000208:ethnology / Q000503:physiopathology; D012565:Schizophrenic Psychology; D055139:Sensory Gating / Q000187:drug effects* / Q000502:physiology
chemical_list: D014150:Antipsychotic Agents