Table 2 Characteristics of interview participants

01

TSC Chair (Clinician)

M

1, 2 (oncology)

02

Senior trial project lead

M

1, 5 (oncology)

03

TSC coordinator #1

M

1, 2 (oncology)

04

TSC coordinator #2

F

1, 2 (oncology)

05

Sponsor representative

F

1, 2 (oncology)

06

Sponsor representative

M

1, 2 (oncology)

07

Trial manager

F

1 (oncology)

08

CI

F

2 (oncology)

09

Trial manager

F

2 (oncology)

10

Trial manager

M

3 (arthritis)

11

Senior statistician

M

3 (arthritis)

12

Senior trial manager

F

3 (arthritis)

13

Statistician

M

3 (arthritis)

14

CI

M

3 (arthritis)

15

TSC Chair (Clinician)

M

3 (arthritis)

16

Trial manager

F

4 (frailty)

17

TSC Chair (Methodologist)

M

4 (frailty)

18

CI

M

4 (frailty)

19

TMG Chair

F

4 (frailty)

20

TMG member

F

4 (frailty)

21

Trial manager

F

5 (oncology)

22

Statistician

F

5 (oncology)

23

CI

M

5 (oncology)

24

Independent TSC member

M

5 (oncology)

25

Independent TSC member

M

5 (oncology)

26

Trial manager

F

6 (urology)

27

Trial manager

F

6 (urology)

28

Statistician

M

6 (urology)

29

CI

M

6 (urology)

30

TSC Chair (Clinician)

M

6 (urology)

31

Independent TSC member

M

6 (urology)

32

TMG member

M

6 (urology)

33

Trial manager

F

7 (psychology)

34

CI

F

7 (psychology)

35

PPI Representative

M

7 (psychology)

36

TSC Chair (Clinician)

F

7 (psychology)

37

Independent statistician

M

7 (psychology)

38

TSC member

M

7 (psychology)

39

CTU Director

F

7 (psychology)

40

Senior trial manager

F

7 (psychology)

41

Trial manager

F

8 (oncology)

42

Chair (Clinician)

M

8 (oncology)

43

PPI representative

F

8 (oncology)

44

Senior statistician

M

8 (oncology)

45

Sponsor representative

M

8 (oncology)

46

CI of other trial/member of TSCs

M

n/a

47

Funder representative

M

n/a

48

Sponsor representative

M

n/a

49

Funder representative

F

n/a

50

Senior statistician

F

n/a

51

Funder representative

F

n/a