Macdonald 2012.

Methods	Identification of subsequent full‐length publications Searched electronic database MEDLINE and PubMed; dates of search not reported Person completing the search not reported Searched by all authors and keywords Matched abstract to full‐length publication by All authors Title Methodology Conclusions
Data	Included 862 abstracts presented at the 1999 to 2008 British Association of Paediatric Surgeons meetings Included all abstracts presented orally except those from the 2009 joint congress with the European Paediatric Surgeons Association
Comparisons	Proportion of abstracts published
Outcomes	302 of 862 abstracts published Proportion of abstracts published by time not reported No factors related to proportion of abstracts published reported
Notes	Surgery ‐ pediatrics Funding not reported
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts presented orally with reasonable exception.
Search for publications?	No	Searched only 1 database.
Follow‐up time?	Unclear	Dates of search not reported.
Matching?	Yes	Matched by 4 different criteria.