Balasubramanian 2006.

Methods	Identification of subsequent full‐length publications Searched electronic database PubMed and Embase to July 2003 Search completed by investigator Searched by all authors and keywords Matching criteria not reported Contacted abstract authors directly
Data	Included 241 abstracts presented at the 1997 Association of Surgeons of Great Britain and Ireland meeting Included all abstracts
Comparisons	Proportion of abstracts published Median time to publication Cumulative proportion of abstracts published Multivariate analysis examining academic affiliation, multi‐center status, clinical design, study design, specialty, presentation type, mention of statistical methods, sample size, results and author number
Outcomes	136 of 241 abstracts published Proportion of abstracts published by time Median time to publication = 18 months (IQR = 11 to 27 months) Cumulative proportion of abstracts published at 78 months showed proportion published = 56.4% (136/241 abstracts) Odds ratio in multivariate analysis comparing multi‐center versus single center studies was 2.1 (95%CI, 0.90 to 4.57); no other factors were significant
Notes	Surgery Funding not reported
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts.
Search for publications?	Yes	Searched 2 databases and contacted abstract authors.
Follow‐up time?	Yes	The meeting had 6 years follow‐up.
Matching?	Unclear	Matching criteria not reported.
Adjustment for confounding?	Yes	Examined association of type of presentation, academic affiliation, multi‐center status, clinical design, study design, mention of statistical methods, sample size, results and author number and subspecialty with publication using multivariable logistic regression analysis.