Table 3 Barriers when seeking regulatory data for use in a Cochrane review

Are there any barriers to using regulatory data?

n = 20

n = 7

n = 133

 Yes

14 (70)

6 (86)

67 (50)

 No

2 (10)

0 (0)

10 (8)

 Unsure

4 (20)

1 (14)

56 (42)

What were these barriers?

n = 14

n = 5

n = 60

 Restricted and limited sharing of data

8

4

31

 Time-constraints

6

2

17

 Lack of experience (inc. statistical)

4

1

21

 Identifying/searching for trials

2

1

13

 Quality of data

1

0

12

 Cost

0

1

1

 Effort/resources required

0

0

5

 Limited access for peer reviewers*

0

0

1