Ahlers‐Schmidt 2009.

Methods	Identification of subsequent full‐length publications Searched electronic database PubMed and Google/Google Scholar; dates of search not reported Person completing the search not reported Searched by all authors, keywords, and title Matching criteria not reported
Data	Included 67 abstracts presented at the 1999 to 2006 Midwestern Regional Medical School Annual Research Forum Included all abstracts accepted as posters at meeting
Comparisons	Proportion of abstracts published Presented by residents versus students Surgery versus non‐surgical topics
Outcomes	23 of 67 abstracts published Proportion of abstracts published by time not reported Factors related to proportion of abstracts published included  20/52 abstracts presented by residents versus 3/15 abstracts presented by students published 15/37 abstracts related to surgery versus 8/30 abstracts related to non‐surgical topics published
Notes	General medicine/primary care Funding not reported Information extracted from letter
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts presented as posters.
Search for publications?	Yes	Searched 2 databases.
Follow‐up time?	Unclear	Date of search not reported.
Matching?	Unclear	Matching criteria not reported.
Adjustment for confounding?	No	Examined association of type author and topic (surgery versus non‐surgery) with publication using stratified analysis and Chi2 tests.