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Table 3 Availability of outcome data by trial subgroup

From: Delays in reporting and publishing trial results during pandemics: cross sectional analysis of 2009 H1N1, 2014 Ebola, and 2016 Zika clinical trials

Trial characteristic

Total trials; n

Registry has results within 12 months of trial completion; n (%)

Months elapsed from completion to results in registry;

median (IQR)

Publication within 24 months of trial completion; n (%)

Months elapsed from completion to publication; median (IQR)

Total

333

15 (5%)

42 (16–76)

129 (39%)

21 (9–34)

Infection

  H1N1

261

11 (4%)

45 (18–78)

94 (36%)

23 (12–34)

  Ebola

60

4 (7%)

16 (12–43)

29 (48%)

11 (-2–34)

  Zika

12

0 (0%)

 

6 (50%)

-3 (-11–18)

Funding Source

  Industry

206

8 (4%)

48 (22–80)

71 (35%)

24 (10–34)

  Federal Government

94

7 (7%)

14 (13–24)

47 (50%)

17 (6–28)

  University

89

2 (2%)

51 (18–75)

49 (55%)

15 (6–27)

  Other

35

2 (6%)

16 (6–32)

16 (46%)

10 (1–28)

Trial Phase

  Phase I

59

1 (2%)

42 (16–49)

24 (41%)

17 (-4–40)

  Phase II

96

11 (12%)

25 (13–73)

43 (45%)

19 (5–28)

  Phase III

79

1 (1%)

43 (21–80)

23 (29%)

28 (18–34)

  Phase IV

54

1 (2%)

65 (24–85)

21 (39%)

19 (12–36)

  Other

45

1 (2%)

21 (14–79)

18 (40%)

18 (9–38)

Intervention Type

  Drug/biologic

44

0 (0%)

32 (19–59)

17 (39%)

19 (9–34)

  Vaccine

276

15 (5%)

43 (16–78)

108 (39%)

22 (9–34)

  Other

13

0 (0%)

 

4 (31%)

22 (13–48)

Recruiting Status in Registry

  Enrollment completed

286

15 (5%)

41 (16–76)

118 (41%)

21 (9–34)

  Enrollment not complete

11

0 (0%)

 

2 (18%)

41 (16–73)

  Stopped early

16

0 (0%)

49 (21–75)

2 (13%)

21 (7–41)

  Suspended/not currently enrolling

4

0 (0%)

 

1 (25%)

 

  Unknown status

16

0 (0%)

 

6 (38%)

13 (5–25)