Kalkan 2015.

Methods	Identification of subsequent full‐length publications Searched electronic database Embase, SCOPUS, Google/Google Scholar, Clinical Key/Elsevier, MD Consult, ULAKBIM, EBSCO Discovery Service, Science Direct, and Medscape; dates of search not reported Person completing the search not reported Searched by all authors, keywords, and title Matched abstract to full‐length publication by All authors Title Summary
Data	Included 1721 abstracts presented at the 2011 to 2012 European Society for Emergency Medicine meetings Included all abstracts
Comparisons	Proportion of abstracts published, overall and by meeting Oral versus poster presentation North American versus European versus Asian origin Australian versus Middle Eastern versus rest of the world origin
Outcomes	437 of 1721 abstracts published 172/626 abstracts presented at the 2001 meeting, and 265/1095 at the 2012 meeting published Proportion of abstracts published by time not reported Factors related to proportion of abstracts published included 160/461 abstracts presented orally versus 277/1260 abstracts presented as posters published 56/161 abstracts originating from North America versus 87/496 abstracts originating from Europe versus 14/28 abstracts originating from Asia versus 8/8 abstracts originating from Australia versus 215/745 abstracts originating from the Middle East versus 57/283 abstracts with rest of the world origin published
Notes	Emergency medicine Funding not reported
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts.
Search for publications?	Yes	Searched 9 databases.
Follow‐up time?	Unclear	Dates of search not reported.
Matching?	Yes	Matched by 3 different criteria.
Adjustment for confounding?	No	Examined association of meeting year by type presentation and country of origin by type presentation, prospective status, abstract quality, and subspecialty with publication using stratified analysis and Chi2 or t tests