Amirhamzeh 2012.

Methods	Identification of subsequent full‐length publications Searched electronic database PubMed and Google/Google Scholar; 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 Contents
Data	Included 762 abstracts presented at the 2002 to 2006 Pediatric Orthopaedic Society of North America meetings Included all abstracts
Comparisons	Proportion of abstracts published Mean time to publication by meeting Oral versus poster Subspecialty
Outcomes	386 of 762 abstracts published Proportion of abstracts published by time Mean time to publication = 29.4 months for 2002 Pediatric Orthopaedic Society of North America meeting Mean time to publication = 26.8 months for 2003 Pediatric Orthopaedic Society of North America meeting Mean time to publication = 26.3 months for 2004 Pediatric Orthopaedic Society of North America meeting Mean time to publication = 22.7 months for 2005 Pediatric Orthopaedic Society of North America meeting Mean time to publication = 18.8 months for 2006 Pediatric Orthopaedic Society of North America meeting Factors related to proportion of abstracts published reported included Reported that oral presentations were 1.47 times (CI, 1.10 to 1.98) more likely to be published compared with posters Reported that there was no differences in proportion published by subspecialty
Notes	Orthopedics/orthopedic surgery ‐ pediatric Funding not reported
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts.
Search for publications?	Yes	Searched 2 databases.
Follow‐up time?	Unclear	Date of search not reported.
Matching?	Yes	Matched by 3 different criteria.
Adjustment for confounding?	No	Examined association of type of presentation and subspecialty with publication using stratified analysis and Chi2 or ANOVA tests.