Duchini 1997.

Methods	Identification of subsequent full‐length publications Searched electronic database MEDLINE; from 1991 to 1996 Person completing the search not reported Search criteria not reported Matching criteria not reported
Data	Included 2512 abstracts submitted to the 1991 Digestive Diseases Week meeting Included all abstracts
Comparisons	Proportion of abstracts published Mean time to publication, overall and by country Clinical versus basic science research North American versus European versus rest of world origin US versus rest of world origin Subspecialty
Outcomes	1229 of 2512 abstracts published Proportion of abstracts published by time Mean time to publication = 20.4 months (SD =12 months) Factors related to proportion of abstracts published included 47.2% of abstracts describing clinical research versus 54.1% of abstracts describing clinical research published 563/1221 abstracts originating from North America versus 406/766 abstracts originating from Europe versus 89/179 abstracts originating from Japan versus 24/55 abstracts originating from Australia versus 78/129 abstracts with multinational origin published 519/1134 abstracts originating from the US versus 563/1087 abstracts originating from the rest of the world published
Notes	Gastroenterology Funding not reported Data extracted from abstract
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts.
Search for publications?	No	Searched only 1 database
Follow‐up time?	Yes	The meeting had 5 years of follow‐up
Matching?	Unclear	Matching criteria not reported.
Adjustment for confounding?	No	Examined association of country of origin, type science, and subspecialty with publication using stratified analysis and Fisher's exact test.