Fernandes 2003.

Methods	Identification of subsequent full‐length publications Searched electronic database PubMed to June 2003 Person completing the search not reported Searched by all authors and keywords Matching criteria not reported
Data	Included 1133 abstracts presented at the XXIV Congresso Brasileiro de Cirurgia meeting; year of meeting not reported Included all abstracts
Comparisons	Proportion of abstracts published Oral versus poster presentation
Outcomes	29 of 1133 abstracts published Proportion of abstracts published by time not reported Factors related to proportion of abstracts published included 9/442 abstracts presented orally versus 17/614 abstracts presented as posters published
Notes	Surgery Funding not reported
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts.
Search for publications?	No	Searched only 1 database.
Follow‐up time?	Unclear	Year of meeting not reported.
Matching?	Unclear	Matching criteria not reported.
Adjustment for confounding?	No	Examined association of type presentation with publication using stratified analysis