Fosbol 2012.

Methods	Identification of subsequent full‐length publications Searched electronic database Web of Science for 1 month prior and 2 years following each conference, up to 5 years for 2006 meeting Search completed by computerized algorithm that was tested using manual search by author Searched by first, second, third, and last author, and keywords Matching criteria not reported
Data	Included 27,208 abstracts presented at the 2006 to 2008 American Heart Association, American College of Cardiology, and European Society of Cardiology meetings Included all abstracts except duplicate entries
Comparisons	Proportion of abstracts published, overall and by meeting Median time to publication, overall and by meeting Cumulative proportion of abstracts published by meeting Clinical research versus basic science research versus population science US origin versus German versus Japanese versus Italian versus UK origin versus rest of the world origin
Outcomes	8,335 of 27,208 abstracts published 2931/10838 abstracts presented at the 2006 to 2008 European Society of Cardiology meetings, 1481/5005 at the 2006 to 2008 American College of Cardiology meetings, and 3923/11365 at the American Heart Association meetings published Proportion of abstracts published by time Median time to publication = 12 months (IQR = 7 to 19 months), overall Median time to publication = 13 months (IQR = 7 to 19 months) for 2006 to 2008 American Heart Association meetings Median time to publication = 13 months (IQR = 6 to 18 months) for 2006 to 2008 American College of Cardiology meetings Median time to publication = 12 months (IQR = 6 to 18 months) for 2006 to 2008 European Society of Cardiology meetings Cumulative proportion of abstracts published at 24 months showed proportion published = 32% (3637/11365 abstracts) for 2006 to 2008 American Heart Association meetings Cumulative proportion of abstracts published at 24 months showed proportion published = 26% (1301/5005 abstracts) for 2006 to 2008 American College of Cardiology meetings Cumulative proportion of abstracts published at 24 months showed proportion published = 24% (2601/10838 abstracts) for 2006 to 2008 European Society of Cardiology meetings Factors related to proportion of abstracts published included 5,099/17,168 abstracts describing clinical research versus 2,140/6,203 abstracts describing basic science research versus 1,105/3,836 abstracts describing population science published 3,400/10,366 abstracts originating from USA versus 986/3,102 abstracts originating from Germany versus 848/2,884 abstracts originating from Japan versus 592/2,013 abstracts originating from Italy versus 581/1,850 abstracts originating from UK versus 1,928/6,993 abstracts with rest of the world origin published
Notes	Cardiology Funded through a foundation and through an award from David and Stevie Spina
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts with reasonable exceptions.
Search for publications?	No	Searched only 1 database.
Follow‐up time?	No	The majority of meetings only had 24 months follow‐up.
Matching?	Unclear	Matching criteria not reported.
Adjustment for confounding?	Yes	Examined association of meeting by year, type science, country of origin, prospective status, abstract quality, and subspecialty with publication using multivariable logistic regression analysis.