Siegfried 2007.

Methods	Identification of subsequent full‐length publications Searched electronic database MEDLINE and specialized register of African trials to June 2006 Search completed by investigator Search criteria not reported Matching criteria not reported
Data	Included 127 conference abstracts included in AIDSearch or NLM Gateway Included all abstracts of randomized controlled trials conducted in Africa or North America from 1985 to 2003 in Africa and in 2000 in North America
Comparisons	Proportion of abstracts published Mean time to publication by country where study conducted North American versus African
Outcomes	86 of 127 abstracts published Proportion of abstracts published by time Mean time to publication = 22.8 months (range = 12 to 84 months) for studies conducted in Africa Mean time to publication = 26.4 months (range = 12 to 72 months) for studies conducted in North America Factors related to proportion of abstracts published included 32/62 abstracts originating from North America versus 54/65 abstracts from Africa published
Notes	Infectious disease/immunology ‐ HIV, AIDS Funding not reported Data extracted from abstract
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts describing RCTs within specific time and region.
Search for publications?	Yes	Searched 2 databases.
Follow‐up time?	Unclear	Date of search unclear.
Matching?	Unclear	Matching criteria not reported.
Adjustment for confounding?	No	Examined association of continent of origin with publication using stratified analysis.