Table 2.
Trials Registered in ClinicalTrials.gov From 2006 Through 2014 by Year of Trial Starta
| Total No. of Trialsb | Funding Agency, No. (%)c | ||||
|---|---|---|---|---|---|
| National Institutes of Health | Industry | Other US Federal Agency | All Others | ||
| Year of trial start | |||||
| 2006 | 9208 | 1189 (12.9) | 4516 (49.0) | 229 (2.5) | 3397 (36.9) |
| 2007 | 10 275 | 1035 (10.1) | 4950 (48.2) | 265 (2.6) | 4163 (40.5) |
| 2008 | 11 650 | 1039 (8.9) | 5359 (46.0) | 278 (2.4) | 5078 (43.6) |
| 2009 | 12 507 | 1062 (8.5) | 5469 (43.7) | 300 (2.4) | 5807 (46.4) |
| 2010 | 12 903 | 1062 (8.2) | 5325 (41.3) | 311 (2.4) | 6324 (49.0) |
| 2011 | 13 514 | 949 (7.0) | 5424 (40.1) | 304 (2.2) | 6955 (51.5) |
| 2012 | 13 909 | 935 (6.7) | 5135 (36.9) | 290 (2.1) | 7668 (55.1) |
| 2013 | 14 221 | 951 (6.7) | 5017 (35.3) | 306 (2.2) | 8084 (56.8) |
| 2014 | 14 618 | 873 (6.0) | 5274 (36.1) | 292 (2.0) | 8295 (56.7) |
| % Difference (95% CI)d,e | −6.9 (−7.7 to −6.2) | −13.0 (−14.2 to −11.7) | −0.5 (−0.1 to 0)f | 19.9 (18.6 to 21.1) | |
| Absolute difference, No. (%)e | 5410 (58.8) | −316 (−26.6) | 758 (16.8) | 63 (27.5) | 4898 (144.2) |
a
Data as of June 26, 2015.
b
One trial may have more than 1 funding source.
c
Unless otherwise indicated.
d
Comparisons yielded P values of <.001 unless otherwise indicated.
e
Comparisons are between the year 2006 and 2014.
f
P = .01.