Nasir 2012.

Methods	Identification of subsequent full‐length publications Searched electronic database PubMed and Google/Google Scholar, and African Journal Online until the end of December 2010 Person completing the search not reported Searched by all authors and title Matched abstract to full‐length publication by Title Hypothesis Study design Personal contacts with authors (meetings, email, telephone)
Data	Included 153 abstracts presented at the 2004, and 2006 to 2009 Association of Paediatric Surgeons of Nigeria meetings Included all abstracts presented orally except those accepted but not presented during the meetings
Comparisons	Proportion of abstracts published, overall and by meeting Mean and median time to publication Observational design versus case report versus survey versus review versus operative technique Multi‐centered versus single center Retrospective versus prospective design Trainees versus consultants Subspecialty
Outcomes	52 of 128 abstracts published 17/30 abstracts presented at the 2004 meeting, 14/26 at the 2006 meeting, 14/40 at the 2007 meeting, and 7/32 at the 2008 meeting Proportion of abstracts published by time Mean time to publication = 23.5 months (range = 12 to 60 months) Median time to publication = 24 months Factors related to proportion of abstracts published included, but all analyses include some abstracts with < 24 months follow‐up 40/112 abstracts describing an observational design versus 11/35 abstracts describing case reports versus 1/1 abstracts describing surveys versus 0/1 abstracts describing reviews versus 0/4 abstracts describing operative technique published 1/2 abstracts with multiple centers versus 51/151 abstracts with a single center published 32/81 abstracts describing a retrospective design versus 8/31 abstracts describing a prospective design published 11/39 abstracts of trainees versus 41/114 abstracts of consultants published
Notes	Surgery ‐ pediatrics Funding not reported Author reported proportion of abstracts published in full from 2009 meeting, but these data were excluded from analyses of proportion published due to < 24 months follow‐up.
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts presented orally with reasonable exception.
Search for publications?	Yes	Searched 2 databases, relevant journals and contacted abstract authors directly.
Follow‐up time?	No	The meetings in 2007 and 2008 had less than 48 months follow‐up. The meetings in 2004 and 2006 had at least 48 months follow‐up.
Matching?	Yes	Matched by 3 different criteria.
Adjustment for confounding?	No	Examined association of meeting year, study design, multi‐center status, prospective status, abstract quality, author status, and subspecialty with publication using stratified analysis and Chi2 or Fisher's Exact tests