title: Systematic reviews involving complementary and alternative medicine interventions had higher quality of reporting than conventional medicine reviews.
abstract: OBJECTIVE
  To compare the quality of systematic reviews reported in English and in languages other than English, and to determine whether there are differences between conventional medicine (CM) and complementary and alternative medicine (CAM) reports.
  
  
  METHODS
  We used the Oxman and Guyatt (OG) scale to assess the quality of reporting in 130 systematic reviews: 50 were language-restricted, 32 were language-inclusive but only English-language (EL) trials contained (inclusive-EL), and 48 were language-inclusive and included trials published in languages other than English (inclusive-LOE). Of the 130 reviews, 105 addressed CM interventions and 25 addressed CAM interventions.
  
  
  RESULTS
  Comparison of the systematic reviews showed that the quality of reporting and reporting characteristics are not affected by inclusion or exclusion of LOE; however, the quality of reporting of systematic reviews involving CAM interventions is higher than that of reviews focusing on CM interventions.
  
  
  CONCLUSIONS
  Informal comparison of the OG scale with the data collected on quality assessments showed that the OG scale performs well overall but may not identify important differences in comprehensiveness of the search strategy and avoidance of bias in study selection. Further research is required to determine the best methods for assessing quality of systematic reviews and whether the effect of language restrictions is dependent on the type of intervention (CM or CAM).
authors: Department of Pediatrics, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada.
authors: Margaret L
authors: ML
authors: Lawson
authors: Ba'
authors: B
authors: Pham
authors: Terry P
authors: TP
authors: Klassen
authors: David
authors: D
authors: Moher
mesh_terms: D015982:Bias; D015706:Bibliometrics; D000529:Complementary Therapies; D006801:Humans; D007802:Language; D015201:Meta-Analysis as Topic; D010506:Periodicals as Topic / Q000592:standards; D011643:Publishing / Q000592:standards; D016032:Randomized Controlled Trials as Topic / Q000592:standards; D012196:Review Literature as Topic