Table 2 Demographics of participants who took part in interviews or focus groups. One researcher did not complete the demographics questionnaire

Gender

Female

8

2

Male

7

11

Ethnicity (free text)

White, European

1

0

White

3

3

White British

8

7

English

1

0

Asian

1

1

British

1

1

Caucasian

0

1

Age (years)

30 or younger

1

1

31–35

0

3

36–40

5

2

41–45

0

2

46–50

1

2

Older than 50

8

3

Highest academic qualification

Doctorate

1

8

Post-graduate degree (Masters)

2

5

Registered nurse & registered midwife

1

0

Undergraduate degree

6

0

Undergraduate degree, teaching certificate

1

0

General Certificate of Secondary Education

1

0

NA

3

0

Have you ever participated in a clinical trial?

No

9

-

Yes

6

-

Have you ever been a member of a public involvement group?

No

5

-

Yes

10

-

Experience in clinical trials research (years)

11–15 years

-

5

16–20 years

-

1

5–10 years

-

1

Less than 5 years

-

2

More than 20 years

-

3

NA

-

1

Current employment sector

Private

-

6

Public

-

7

Location

United Kingdom

-

11

United States of America

-

2

Area of expertise (can choose multiple)

Clinician

-

1

Health economics

-

8

Health services research

-

1

Value of information analysis

-

2

Adaptive designs

-

3

Clinical trial management

-

1

Statistics

-

5