title: Delay and failure to publish dental research.
abstract: OBJECTIVE
  To investigate the incidence and time taken to full publication of abstracts presented at dental scientific meetings.
  
  
  METHODS
  A retrospective observational study.
  
  
  METHODS
  All abstracts from the 1993 proceedings of the European Orthodontic Society (EOS) and European Organisation for Caries Research (ORCA) and a 10% random sample of abstracts from the International Association for Dental Research (IADR) conferences.
  
  
  METHODS
  A cross-referenced Medline search of abstract title and authors was undertaken to determine whether abstracts had been published as full papers. Searches were censored 1 year prior to and 5 years post publication as an abstract. Publication rate was compared between abstracts presented orally and as posters.
  
  
  METHODS
  Publication as a full paper and time taken to publication.
  
  
  RESULTS
  546 abstracts were investigated. 252 abstracts (46.1%) were found as full reports. Median time to publication of all abstracts was 18 months (IQR 9, 30 months). 99 of the oral abstracts (57%) and 153 (41%) of the poster abstracts were published. Relative Risk Oral vs Poster=1.37 CI (1.19, 1.55).
  
  
  CONCLUSIONS
  More than half of the research presented at EOS, IADR and ORCA in 1993 remained unpublished 5 years after presentation at the conference. Oral presentations were published more frequently than poster presentations.
authors.affiliation: Department of Clinical Dental Sciences, Liverpool University Dental Hospital and School of Dentistry, Pembroke Place, Liverpool L3 5PS.
authors.forename: J M
authors.initials: JM
authors.lastname: Scholey
authors.forename: J E
authors.initials: JE
authors.lastname: Harrison
mesh_terms: D000043:Abstracting and Indexing; D018865:Dental Research; D016239:MEDLINE; D009970:Orthodontics; D017594:Publication Bias; D011643:Publishing; D013997:Time Factors