Hernandez‐Garcia 2011.

Methods	Identification of subsequent full‐length publications Searched electronic database MEDLINE, Indice Medico Espanol to June 2010 Person completing the search not reported Searched by all authors Matched abstract to full‐length publication by Title Contents Results Contacted abstract authors directly
Data	Included 325 abstracts presented at the 2006 Spanish Society for Quality in Healthcare meeting Included all abstracts presented orally
Comparisons	Proportion of abstracts published Hospital versus not hospital Spanish origin versus non‐Spanish origin
Outcomes	15 of 325 abstracts published Proportion of abstracts published by time not reported Factors related to proportion of abstracts published included 10/212 abstracts in hospitals versus 5/113 abstracts not in hospitals published 15/320 abstracts originating in Spain versus 0/2 abstracts not originating in Spain published
Notes	Medical decision making/health policy ‐ quality in healthcare Funding not reported Data extracted from letter
Risk of bias
Item	Authors' judgement	Description
Sampling method?	Yes	Included all abstracts presented orally.
Search for publications?	Yes	Searched 2 database and contacted abstract authors.
Follow‐up time?	Yes	The meeting had 48 months follow‐up.
Matching?	Yes	Matched by 3 different criteria.
Adjustment for confounding?	No	Examined association of institutional affiliation, and Spanish origin with publication using stratified analysis and Chi2 or Fisher's Exact tests