Harris 2006.

Methods	Identification of subsequent full‐length publications Searched electronic database Embase, MEDLINE to March 2004 Person completing the search not reported Searched by all authors and keywords Matching criteria not reported Contacted abstract authors directly
Data	Included 200 abstracts presented at the 1998 Australian Orthopaedic Association meeting Included all abstracts accepted as oral presentations
Comparisons	Proportion of abstracts published 'Positive' versus not 'positive' Clinical research versus basic science research RCT design versus observational versus case series versus other design North American versus European versus Australian versus Asian versus Oceanian origin
Outcomes	62 of 200 abstracts published Proportion of abstracts published by time not reported Factors related to proportion of abstracts published included 12/24 'positive' (defined as significant results) versus 50/176 not 'positive' abstract results published 45/132 'positive' (defined as experimental better than control) versus 17/68 not 'positive' abstract results published 40/159 abstracts describing clinical research versus 22/41 abstracts describing basic science research published 1/3 abstracts with RCT design versus 17/41 abstracts with observational study design versus 31/103 abstracts with case series design versus 13/53 with other design published 21/55 abstracts originating from North America versus 5/19 abstracts from Europe versus 32/110 abstracts from Australia versus 4/11 abstracts from Asia versus 0/5 abstracts from Oceania published
Notes	Orthopedics/orthopedic surgery Funding not reported
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts accepted as oral presentations
Search for publications?	Yes	Searched 2 databases and contacted abstract authors.
Follow‐up time?	Yes	The meeting had 6 years follow‐up.
Matching?	Unclear	Matching criteria not reported.
Adjustment for confounding?	Yes	Examined association of positive results, type science, study design, and country of origin using multivariable logistic regression analysis.