Ravn 2014.

Methods	Identification of subsequent full‐length publications Searched electronic database CINAHL, Embase, PubMed until May 2013 Search completed by the investigators Searched by all authors, keywords, and title Matched abstract to full‐length publication by Sample size Methodology Results Contacted abstract authors directly
Data	Included 118 abstracts presented at the 2009 to 2011 Danish Society for Emergency Medicine meetings Included all abstracts, but only 63 of 118 abstracts have a follow‐up of 24 months
Comparisons	Proportion of abstracts published, overall and by meeting Oral versus poster presentation
Outcomes	17 of 63 abstracts with 24 months or more follow‐up published; 35 of 118 of all abstracts published 6/19 abstracts presented at the 2009 meeting, 11/44 at the 2010 meeting, and 8/55 at the 2011 meeting published Proportion of abstracts published by time not reported Factors related to proportion of abstracts published included 4/10 abstracts presented orally versus 21/108 abstracts presented as poster published, but abstracts with less than 24 months included
Notes	Emergency medicine Funding not reported
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts.
Search for publications?	Yes	Searched 3 databases and contacted abstract authors.
Follow‐up time?	No	Only the meeting in 2009 had 48 months follow‐up. All other meetings had less than 48 months follow‐up.
Matching?	Yes	Matched by 3 different criteria.
Adjustment for confounding?	No	Examined association of meeting year and type presentation with publication using Fisher's Exact test.