Date	Event	Description
4 April 2012	New citation required but conclusions have not changed	New search incorporated. Dr AV Swan retired from authorship.
17 February 2012	New search has been performed	No trials found, minor changes to text.
20 January 2010	New citation required but conclusions have not changed	Dr R van Koningsveld retired from authorship.
10 June 2009	New search has been performed	New search to June 2009: no new trials found. New MEDLINE filter used.
22 July 2008	Amended	Converted to new review format.
28 February 2007	New search has been performed	The searches were updated in February 2007, but no new studies were identified.
31 January 2006	New citation required and conclusions have changed	A large trial has been added almost doubling the amount of evidence. This trial showed a trend towards more improvement on short‐term benefit which became significant after taking into account prognostic factors that were imbalanced between the groups at randomisation. This did not alter the conclusion of the meta‐analysis from all trials that corticosteroids do not produce significant benefit.
21 October 1999	Amended	An error in entering the standard deviations for change in disability grade after one year for the trial of Hughes 1978, has been corrected in the table of comparisons. This has resulted in the difference between the groups becoming not significant for that outcome, in agreement with the other outcome measures.