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Table 1 Clinical Trial Characteristics

From: Clinical trials involving positron emission tomography and prostate cancer: an analysis of the ClinicalTrials.gov database

Primary Purpose of a Trial

 Diagnostic

93

68%

 NRa

20

15%

 Treatment

17

12%

 Screening

3

2%

 Other

2

1%

 Basic Science

2

1%

Trial has data monitoring comity?

 No

53

39%

 Yes

60

44%

 NRa

24

18%

Number of collaborators

 0

78

57%

 1

43

31%

 2

12

9%

 3

4

3%

Number of recruitment centers per trial

 1

125

91%

 2

2

1%

 3

2

1%

 NRa

8

6%

Trial duration in years - Median (Range)

3 years (1–21)

Year of last database entry update

  ≤ 2014

13

9%

 2015

13

9%

 2016

39

28%

 2017

72

53%

Trials with results submitted to the ClinicalTrials.gov

14

10%

Number of patients

 0–25

47

34%

 26–50

27

20%

 50–100

22

16%

 101–200

22

16%

 200–300

10

7%

 301–400

1

1%

  > 401

4

3%

 NRa

4

3%

  1. aNR not registered