Vuckovic‐Dekic 2001.

Methods	Identification of subsequent full‐length publications Contacted abstract authors directly
Data	Included 63 abstracts presented at the 1996 and 1998 First and Second Balkan Congress of Oncology meetings Included all abstracts by authors affiliated to Serbian institutions and responding to enquiry
Comparisons	Proportion of abstracts published Oral versus poster presentation
Outcomes	42 of 63 abstracts published Proportion of abstracts published by time not reported Factors related to proportion of abstracts published included 16/23 abstracts presented orally versus 26/40 abstracts presented as poster published
Notes	Oncology Funding not reported
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts that described specific subgroup, so low risk of bias.
Search for publications?	No	Contacted abstract authors, but response rate <80%.
Follow‐up time?	Yes	The meeting in 1996 had 5 years follow‐up, but the meeting in 1998 only had 36 months follow‐up.
Matching?	Yes	Matched through contact with abstract author.
Adjustment for confounding?	No	Examined association of type presentation with publication using stratified analysis and unspecified statistical tests.