Chapman 2012.

Methods	Identification of subsequent full‐length publications Searched electronic database PubMed, Embase, Cochrane Methodology Register to May 2009, then to September 2010 for 2007 meeting Person completing the search not reported Searched by all authors and keywords Matched abstract to full‐length publication by Title  Handsearched and searched citations in review articles
Data	Included 908 abstracts presented at the 1997 to 2007 Cochrane Colloquia meetings Included all abstracts that presented "research relevant to the methods of systematic reviews or other health care evaluations"
Comparisons	Proportion of abstracts published, overall and by meeting Mean and median time to publication, overall and by meeting Survival analysis of publication rate Oral versus poster presentation Methodologic/topic area
Outcomes	312 of 908 abstracts published 21/63 abstracts presented at the 1997 meeting, 21/58 at the 1998 meeting, 20/59 at the 1999 meeting, 10/32 at the 2000 meeting, 27/85 at the 2001 meeting, 12/89 at the 2002 meeting, 44/115 at the 2003 meeting, 45/113 at the 2004 meeting, 42/119 at the 2005 meeting, 37/133 at the 2006 meeting, and 33/92 at the 2007 meeting published Proportion of abstracts published by time Mean time to publication = 22.8  months, overall Mean time to publication = 37.2 months for 1997 Cochrane Colloquium Mean time to publication = 26.4 months for 1998 Cochrane Colloquium Mean time to publication = 28.8 months for 1999 Cochrane Colloquium Mean time to publication = 33.6 months for 2000 Cochrane Colloquium Mean time to publication = 26.4 months for 2001 Cochrane Colloquium Mean time to publication = 31.2 months for 2002 Cochrane Colloquium Mean time to publication = 24.0 months for 2003 Cochrane Colloquium Mean time to publication = 18.0 months for 2004 Cochrane Colloquium Mean time to publication = 16.8 months for 2005 Cochrane Colloquium Mean time to publication = 14.4 months for 2006 Cochrane Colloquium Mean time to publication = 19.2 months for 2007 Cochrane Colloquium Median time to publication = 24 months, overall Median time to publication = 36 months for 1997 Cochrane Colloquium Median time to publication = 24 months for 1998 Cochrane Colloquium Median time to publication = 24 months for 1999 Cochrane Colloquium Median time to publication = 36 months for 2000 Cochrane Colloquium Median time to publication = 24 months for 2001 Cochrane Colloquium Median time to publication = 30 months for 2002 Cochrane Colloquium Median time to publication = 24 months for 2003 Cochrane Colloquium Median time to publication = 24 months for 2004 Cochrane Colloquium Median time to publication = 12 months for 2005 Cochrane Colloquium Median time to publication = 12 months for 2006 Cochrane Colloquium Median time to publication = 12 months for 2007 Cochrane Colloquium Survival analysis of proportion published at 144 months = 36.4% Factors related to proportion of abstracts published included 123/312 abstracts presented orally versus 189/596 abstracts presented as poster published
Notes	Medical decision making/health policy‐ systematic reviews, health technology Funding from the National Institute for Health Research; National Health Research and Development Program, the Cochrane Collaboration
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts that described a specific topic, so low risk of bias.
Search for publications?	Yes	Searched 3 databases, and performed handsearches and citation searches.
Follow‐up time?	Yes	All meetings before 2006 had at least 48 months follow‐up. The meetings in 2006 and 2007 only had 36 months follow‐up.
Matching?	No	Matched by only 1 criterion.
Adjustment for confounding?	No	Examined association of meeting year, type presentation, and methodologic area with publication using stratified analysis.