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Table 5 Extensions to trials

From: A reinvestigation of recruitment to randomised, controlled, multicenter trials: a review of trials funded by two UK funding agencies

Was an extension granted and if so, what type? 1994 to 2002 2002 to 2008
Total Total With CTU Without CTU HTA MRC
  N n (%) N n (%) N n (%) N n (%) N n (%) N n (%)
  122   73   31   40   31   41  
No   57 (47)   39 (53)   13 (42)   25 (63)   11 (36)   28 (68)
Time extension   15 (12)   22 (30)   14 (45)   7 (18)   17 (55)   4 (10)
Grant extension   8 (7)   1 (1)   0 (0)   1 (3)   0 (0)   1 (2)
Time + grant extension   42 (34)   10 (14)   4 (13)   6 (15)   3 (10)   7 (17)
Missing   0 (0)   1 (1)   0 (0)   1 (3)   0 (0)   1 (2)
  1. CTU, clinical trials units; HTA, Health Technology Assessment; MRC, Medical Research Council.