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

Table 5 Extensions to trials

Was an extension granted and if so, what type?	1994 to 2002		2002 to 2008
Was an extension granted and if so, what type?	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)

CTU, clinical trials units; HTA, Health Technology Assessment; MRC, Medical Research Council.

ISSN: 1745-6215