Hopewell 2015.

Methods	Identification of subsequent full‐length publications Searched electronic database PubMed from 1 January, 2010 until June 2013 Search completed by investigators Searched by first, and last author, keywords, and title Matching criteria not reported
Data	Included 197 abstracts presented at the 2010 Infectious Diseases Society of America, American Thoracic Society, American Society of Hematology, American Society of Clinical Oncology, American Society of Anesthesiologists, American Psychiatric Association, American Heart Association, American Diabetes Association, and American College of Rheumatology meetings Included all abstracts of systematic reviews except those of animal studies
Comparisons	Proportion of abstracts published, overall and by meeting Median time to publication, overall and by meeting Cumulative proportion of abstracts published, overall and by meeting Oral versus poster presentation
Outcomes	105 of 197 abstracts published 5/8 abstracts presented at Infectious Diseases Society of America meeting, 17/25 at the American Thoracic Society meeting, 15/34 at the American Society of Hematology meeting, 28/57 at the American Society of Clinical Oncology meeting, 2/8 at the American Society of Anesthesiologists meeting, 3/7 at the American Psychiatric Association meeting, 17/32 at the American Heart Association meeting, 5/8 at the American Diabetes Association meeting, and 13/18 at the American College of Rheumatology meeting published Proportion of abstracts published by time Median time to publication = 14.0 months (IQR = 6.6 to 20.1 months), overall Median time to publication = 12.3 months (IQR = 6.5 to 22.9 months) for 2010 Infectious Diseases Society of America meeting Median time to publication = 15.9 months (IQR = 9 to 23.4 months) for 2010 American Society of Hematology meeting Median time to publication = 15.9 months (IQR = 11.9 to 22.9 months) for 2010 American Society of Clinical Oncology meeting Median time to publication = 10.0 months (IQR = 5.5 to 14.5 months) for 2010 American Society of Anesthesiologists meeting Median time to publication = 17.4 months (IQR = 0.3 to 26.4 months) for 2010 American Psychiatric Association meeting Median time to publication = 10.9 months (IQR = 4.2 to 19.6 months) for 2010 American Heart Association meeting Median time to publication = 11.8 months (IQR = 7.6 to 20 months) for 2010 American Thoracic Society meeting Median time to publication = 8.2 months (IQR = 2.7 to 20.2 months) for 2010 American Diabetes Association meeting Median time to publication = 5.7 months (IQR = 4.7 to 20.8 months) for 2010 American College of Rheumatology meeting Cumulative proportion of abstracts published at 36 months showed proportion published = 53.3% (105/197 abstracts), overall Cumulative proportion of abstracts published at 36 months showed proportion published = 62.5% (5/8 abstracts) for 2010 Infectious Diseases Society of America meeting Cumulative proportion of abstracts published at 36 months showed proportion published = 44.1% (15/34 abstracts) for 2010 American Society of Hematology meeting Cumulative proportion of abstracts published at 36 months showed proportion published = 49.1% (28/57 abstracts) for 2010 American Society of Clinical Oncology meeting Cumulative proportion of abstracts published at 36 months showed proportion published = 25.0% (2/8 abstracts) for 2010 American Society of Anesthesiologists meeting Cumulative proportion of abstracts published at 36 months showed proportion published = 42.9% (3/7 abstracts) for 2010 American Psychiatric Association meeting Cumulative proportion of abstracts published at 36 months showed proportion published = 53.1% (17/32 abstracts) for 2010 American Heart Association meeting Cumulative proportion of abstracts published at 36 months showed proportion published = 68.0% (17/25 abstracts) published for 2010 American Thoracic Society meeting Cumulative proportion of abstracts published at 36 months showed proportion published = 62.5% (5/8 abstracts) for 2010 American Diabetes Association meeting Cumulative proportion of abstracts published at 36 months showed proportion published = 72.2% (13/18 abstracts) for 2010 American College of Rheumatology meeting Factors related to proportion of abstracts published included 19/33 abstracts presented orally versus 86/164 abstracts presented as poster published
Notes	Other clinical specialties ‐ rheumatology, endocrinology ‐ diabetes, cardiology, psychiatry, anesthesiology, oncology, hematology, thoracic medicine, infectious diseases Reported not receiving funding
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts that described specific study design with reasonable exception, so low risk of bias.
Search for publications?	No	Searched only 1 database.
Follow‐up time?	No	All meetings only had 36 months follow‐up.
Matching?	Unclear	Matching criteria not reported.
Adjustment for confounding?	No	Examined association of meeting and type presentation with publication using stratified analysis.