title: Conclusiveness of the Cochrane reviews in gynaecological cancer: A systematic analysis.
abstract: OBJECTIVE
  To assess the conclusiveness of Cochrane reviews in the field of gynaecological cancer.
  
  
  METHODS
  The Cochrane Library was searched for reviews regarding gynaecological cancer published between 1 January 2000 and 1 November 2014. Data were extracted from each paper and the conclusiveness of each review was assessed.
  
  
  RESULTS
  The study included 66 reviews, 41 (62.1%) of which were conclusive. Of these, 58 included randomized controlled trials (RCTs), 37 (63.8%) of which were conclusive. Conclusive reviews of RCTs included significantly more patients than inconclusive reviews, but there was no difference in the number of included studies. Of the eight reviews of nonrandomized studies, four (50.0%) were conclusive. The majority of reviews recognized the need for additional studies.
  
  
  CONCLUSIONS
  In the field of gynaecological cancer, reviews are more likely to be conclusive when they include RCTs, as well as large numbers of patients.
authors: Department of Obstetrics and Gynaecology, Navy General Hospital, Beijing, China.
authors: Shande
authors: S
authors: Yin
authors: Department of Obstetrics and Gynaecology, Navy General Hospital, Beijing, China.
authors: Yunhai
authors: Y
authors: Chuai
authors: Department of Obstetrics and Gynaecology, Navy General Hospital, Beijing, China.
authors: Aiming
authors: A
authors: Wang
authors: Department of Obstetrics and Gynaecology, Navy General Hospital, Beijing, China wangyh85@foxmail.com.
authors: Lanmei
authors: L
authors: Zhang
mesh_terms: D005260:Female; D005833:Genital Neoplasms, Female; D006801:Humans; D018156:Journalism, Medical / Q000592:standards*
keywords: Gynaecological cancer; Nonrandomised study; Randomized clinical trial; Systematic review