Mutlu 2015.

Methods	Identification of subsequent full‐length publications Searched electronic database PubMed and Google/Google Scholar to March 2013 Person completing the search not reported Searched by first and second author, and title Matched abstract to full‐length publication by Title Results Protocol
Data	Included 214 abstracts presented at the 2005 to 2008 National Congress of Child and Adolescent Psychiatry meetings Included all abstracts accepted for poster presentation
Comparisons	Proportion of abstracts published, overall and by meeting Mean time to publication, overall and by meeting Cumulative proportion of abstracts published Research type versus case type
Outcomes	54 of 214 abstracts published 13/51 abstracts presented at the 2005 meeting, 19/64 at the 2006 meeting, 12/59 at the 2007 meeting, and 10/40 at the 2008 meeting published Proportion of abstracts published by time Mean time to publication = 30.7 months (SD = 18.9; range = 4 to 74 months), overall Mean time to publication = 35.3 months (SD = 22.6) for 2005 National Congress of Child and Adolescent Psychiatry meeting Mean time to publication = 24.4 months (SD = 16.1) for 2006 National Congress of Child and Adolescent Psychiatry meeting Mean time to publication = 33.8 months (SD = 18.9) for 2007 National Congress of Child and Adolescent Psychiatry meeting Mean time to publication = 33.0 months (SD = 18.2) for 2008 National Congress of Child and Adolescent Psychiatry meeting Cumulative proportion of abstracts published at 60 months showed proportion published = 23.8% (51/214 abstracts) Factors related to proportion of abstracts published included 40/141 abstracts with research type versus 14/73 abstracts with case type published
Notes	Psychiatry ‐ childhood and adolescents Reported receiving no funding
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts accepted for poster presentation.
Search for publications?	Yes	Searched 2 databases.
Follow‐up time?	Yes	All meetings had at least 5 years follow‐up.
Matching?	Yes	Matched by 3 different criteria.
Adjustment for confounding?	No	Examined association of meeting year and study design with publication using stratified analysis and Chi2 or Mann‐Whitney U tests.