Table 1

Numbers of various data sharing statements for randomly selected British Medical Journal (BMJ) research articles (2009–2015) that indicated the availability of their raw data

2009201020112012201320142015 (1)2015 (2)Total
Additional data available from author1134325019
Reasonable requests for access to data can be made to the authors0102127215
Data were available from external sources subject to additional applications010101328
Data publicly available000002035
Data were available once they had completed all planned analyses and published results010100002
Data were available after 3 years, subject to a contract and authors will examine requests000001001