Odunsi 2015.

Methods	Identification of subsequent full‐length publications Searched electronic database PubMed; date of search not reported Person completing the search not reported Searched by first and last author, and title Matching criteria not reported
Data	Included 627 abstracts presented at the 2007 to 2009 Association of British Neurologists meetings Included all abstracts
Comparisons	Proportion of abstracts published Mean time to publication Oral versus poster presentation Case report versus other design Multi‐centered versus single center
Outcomes	244 of 627 abstracts published Proportion of abstracts published by time Mean time to publication = 18.6 months (SD = 14.6) Factors related to proportion of abstracts published included 135/299 abstracts presented orally versus 109/328 abstracts presented as poster published 32/106 abstracts describing case report design versus 212/489 abstracts describing other design published 126/390 abstracts with multiple centers versus 122/239 abstracts with single center published
Notes	Neurology Reporting having received no funding Data extracted from letter
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts.
Search for publications?	No	Searched only 1 database.
Follow‐up time?	Unclear	Date of search not reported.
Matching?	Unclear	Matching criteria not reported.
Adjustment for confounding?	No	Examined association of type of presentation, study design, and multi‐center status with publication using stratified analysis and Chi2 tests.