Goldman 1980.

Methods	Identification of subsequent full‐length publications Searched electronic database MEDLARS from November 1975 through June 1979 Search completed by investigator Searched by first author Matched abstract to full‐length publication by All authors Sample size Title Contents Results
Data	Included 276 abstracts submitted to the 1976 American Federation for Clinical Research, American Society for Clinical Investigation, Association for American Physicians, and American College of Cardiology meetings and the 1975 American Heart Association Included 69 abstracts representing all cardiology presentations and posters and 69 randomly selected cardiology abstracts from those not presented at the 1976 meetings of American Federation for Clinical Research, American Society for Clinical Investigation, and Association of American Physicians; 69 randomly selected abstracts from the 1976 American College of Cardiology scientific sessions; and 69 randomly selected abstracts from the 1975 American Heart Association :
Comparisons	Proportion of abstracts published, overall and by meeting Median time to publication Cumulative proportion of abstracts published Accepted versus rejected for conference presentation Affiliated with US medical school versus other US. and non‐US institutions Oral versus poster presentation
Outcomes	137 of 276 abstracts published 38/69 abstracts presented at the 1975 American Heart Association meeting, 34/69 at the 1976 American College of Cardiology meeting, and 65/138 at the American Federation for Clinical Research, American Society for Clinical Investigation, Association for American Physicians meetings published Proportion of abstracts published by time Median time to publication = 14 months Cumulative proportion of abstracts published at 36 months showed proportion published = 48.9% (135/276 abstracts) Factors related to proportion of abstracts published included 113/207 abstracts accepted for presentation versus 24/69 rejected abstracts published 112/205 abstracts from US medical schools versus 25/71 abstracts from other US and non‐US institutions published Stated that 'oral presentations and posters were equally likely to result in articles'
Notes	Cardiology Funding not reported
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts that described a specific topic, and a random sample of accepted and rejected abstracts on other topics, so low risk of bias.
Search for publications?	No	Searched only 1 database.
Follow‐up time?	No	All meetings in 1976 only had 36 months follow‐up. The meeting in 1975 had 48 months follow‐up.
Matching?	Yes	Matched by 5 different criteria.
Adjustment for confounding?	No	Examined association of meeting, acceptance for presentation, institutional affiliation, and type presentation with publication using stratified analysis and Chi2, Kruskal Wallis ANOVA, or Mann‐Whitney U tests