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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.