Trial 1 - comparing Long Stockings with No Stockings

The trial recruited its first patient in March 2001
64 Hospitals in 3 Countries enrolled patients in Trial 1
Altogether 2518 patients participated 

The trial stopped enrolling patients on November 2008 and the results were published in the Lancet in May 2009

See results

Trial 2 - comparing Long Stockings with Short Stockings

The trial enrolled its first patient in January 2002
114 Hospitals in 9 countries enrolled patients in Trial 2
A total of 3114 patients participated

The trial stopped enrolling patients in May 2009 and the results will
 be available in December 2009

Trial 3 - comparing Intermittent Pneumatic Compression (IPC) with No IPC

The trial enrolled its first patient in December 2008
This is a UK-only trial
So far 89 Hospitals are participating -
more UK hospitals will be coming on-board soon
At this point in time the trial has enrolled 2513 patients

see details of Trial 3