title: Quality of reporting of randomized controlled trials in general endocrinology literature.
abstract: BACKGROUND
  The reporting quality of randomized controlled trials (RCTs) is poor in general medicine and several areas of specialization but unknown in endocrinology.
  
  
  OBJECTIVE
  Our aim was to assess the reporting quality of RCTs in general endocrinology. A secondary objective was to identify predictors for better reporting quality.
  
  
  METHODS
  We systematically reviewed RCTs published in three general endocrinology journals between January 2005 and December 2006.
  
  
  METHODS
  We included parallel-design RCTs that addressed a question of treatment or prevention. Article selection and data abstraction were conducted by two reviewers independently, and disagreements were resolved by consensus.
  
  
  RESULTS
  There were two main outcomes: 1) a 15-point overall reporting quality score (OQS) based on the Consolidated Standards for Reporting Trials (CONSORT); and 2) a 3-point key score, based on allocation concealment, blinding, and use of intention-to-treat analysis.
  
  
  RESULTS
  Eighty nine RCTs were included. The median OQS was 10 (interquartile range = 2). Allocation concealment, blinding, and analysis by intention to treat were reported in 10, 20, and 16 of the 89 RCTs, respectively. A multivariable regression analysis showed that complete industrial funding [incidence rate ratio (IRR) = 1.014; 95% confidence interval (CI), 1.010-1.018], journal of publication (IRR = 1.068; 95% CI, 1.007-1.132), and sample size (IRR = 1.048; 95% CI, 1.026-1.070) were significantly associated with a slightly better OQS.
  
  
  CONCLUSIONS
  The quality of RCT reporting in general endocrine literature is suboptimal. We discuss our results, highlight the areas where improvements are needed, and provide some recommendations.
authors.affiliation: Father Sean O'Sullivan Research Centre, St. Joseph's Healthcare, Hamilton, Ontario, L8N 4A6 Canada.
authors.forename: Lorena P
authors.initials: LP
authors.lastname: Rios
authors.forename: Adefowope
authors.initials: A
authors.lastname: Odueyungbo
authors.forename: Misha O
authors.initials: MO
authors.lastname: Moitri
authors.forename: Mohammed O
authors.initials: MO
authors.lastname: Rahman
authors.forename: Lehana
authors.initials: L
authors.lastname: Thabane
mesh_terms: D000465:Algorithms; D004704:Endocrinology / Q000379:methods*; D006801:Humans; D011643:Publishing / Q000592:standards; D011786:Quality Control; D016032:Randomized Controlled Trials as Topic; D012107:Research Design / Q000592:standards