title: [A systematic evaluation on the quality of Meta-analysis in articles published in the Chinese Journal of Gastrointestinal Surgery from 1998 to 2014].
abstract: OBJECTIVE
  To assess the methodological quality and reporting quality on Meta-analysis being published in the Chinese Journal of Gastrointestinal Surgery.
  
  
  METHODS
  Computerized literature searching was carried out in Wanfang Medical Online to collect articles that Meta-analysis was used in the Chinese Journal of Gastrointestinal Surgery since it was founded till July, 2014. Manual retrieval was also conducted. Two researchers independently screened for literature and extracted data. Qualities on methodologies or on the processes of reporting and reviewing were evaluated by both AMSTAR and PRISMA scales.
  
  
  RESULTS
  Forty-two papers on meta-analyses were included in this study. Results on the quality of methodology evaluation showed that the lowest and highest scores were 6 and 9 respectively, the median score was 7. Two articles (4.8%) were rated as high, 40 articles (95.2%) as moderate and 0 articles (0%) as low. Although the quality of methodology was above the average, however, there were still some problems seen in some papers as the conflict of interest was not stated, the list of studies (included and excluded) was not provided, a comprehensive literature search was not performed, the likelihood of publication bias was not assessed, etc. Results on the quality of reporting evaluation showed that the lowest and highest scores were 14 and 22 respectively, the average score was 18.43 ± 2.03, 3 articles (7.1%) scored less than 15 points, 35 articles (83.3%) scored 15.5-21 points, and 4 articles (9.6%) scored 21.5-27 points. The included reviews had high quality on the titles of the report, inclusion criteria, rationale of introduction, synthesis of results, results of individual. However, the abstract, objectives of introduction, scheme and registered, inclusion criteria, research screening, additional analysis, conclusion limitations, funding support etc. were lack of comprehensive reports.
  
  
  CONCLUSIONS
  Articles on Meta-analysis published in the Chinese Journal of Gastrointestinal Surgery are of high quality. The Chinese Journal of Gastrointestinal Surgery can provide better evidence for clinical decision to gastrointestinal surgeons. However, both of qualities on methodology and reports sill call for continuous improvement.
authors.affiliation: Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention of TB Control, Nanning 530028, China. tengyanwu@163.com.
authors.forename: Suosu
authors.initials: S
authors.lastname: Wei
authors.forename: Huide
authors.initials: H
authors.lastname: Wei
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Huang
authors.forename: Yi
authors.initials: Y
authors.lastname: Tan
authors.forename: Guanghe
authors.initials: G
authors.lastname: Yang
authors.forename: Jinghong
authors.initials: J
authors.lastname: Liu
authors.forename: Wenjuan
authors.initials: W
authors.lastname: Lyu
authors.forename: Ying
authors.initials: Y
authors.lastname: Wei
authors.forename: Siqi
authors.initials: S
authors.lastname: Lan
authors.forename: Hui
authors.initials: H
authors.lastname: Liu
authors.forename: Tengyan
authors.initials: T
authors.lastname: Wu
mesh_terms: D013505:Digestive System Surgical Procedures; D006801:Humans; D015201:Meta-Analysis as Topic; D011643:Publishing