Petticrew 1999.

Methods	Identification of subsequent full‐length publications Searched electronic database Electronic database not specified; dates of search not reported Person completing the search not reported Search criteria not reported Matching criteria not reported Contacted abstract authors directly
Data	Included 77 abstracts presented at the 1996 Society of Social Medicine meeting Included all abstracts accepted for oral presentation
Comparisons	Proportion of abstracts published 'Positive' versus not 'positive'
Outcomes	39 of 77 abstracts published Proportion of abstracts published by time not reported Factors related to proportion of abstracts published included 18/36 'positive' (defined as experimental better than control) versus 21/41 not 'positive' abstract results published
Notes	Sociology Reported receiving no funding
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts accepted for oral presentation.
Search for publications?	Yes	Searched database, but number and type of database not reported, and contacted abstract authors.
Follow‐up time?	Unclear	Date of search not reported.
Matching?	Unclear	Matching criteria not reported.
Adjustment for confounding?	No	Examined association of positive results with publication using stratified analysis and calculated relative risks.