Table 1.

Characteristics of focus group, interview, and survey participants

Characteristics	Percent or Mean (SD)
Focus group participants (N=23)
Gender
Female	74%
Male	26%
Race
African American	39%
White/Caucasian	61%
Ethnicity
Hispanic	17%
Non-Hispanic	83%
Age
18–29	4%
30–49	22%
50–64	44%
65 or older	26%
Highest level of education
Some high-school	9%
High-school/GED	17%
Some college	9%
Bachelor’s or Associate degree	39%
Master’s or Doctoral degree	22%
Interviewed investigators (N=5)
Gender (% women)	40%
Race (% white)	80%
Years of experience with clinical trials, mean (std)	16.6 (10.8)
Number of pragmatic trials conducted, mean (std)	3.2 (1.2)
Experience with other types of trials (%)	80%
Sample size of most recent trial, mean (range)	55,240 (300 to 180,000)
Duration of follow-up of most recent trial, years mean (range)	5.3 (1 to 20)
Surveyed investigators (N = 12)
Years of experience with clinical trials, mean (std)	9.1 (9.1)
Number of pragmatic trials conducted, mean (std)	2.9 (3.1)
Experience with other types of trials (%)	83%
Sample size of most recent trial, mean (range)	14,468 (900 to 90,000)
Duration of follow-up of most recent trial, years mean (range)	1.6 (1 to 3)