Table 1.
Trials Registered in ClinicalTrials.gov From 2006 Through 2014 by Year First Receiveda
| Total No. of Trialsb | Funding Agency, No. (%)c | ||||
|---|---|---|---|---|---|
| National Institutes of Health | Industry | Other US Federal Agency | All Others | ||
| Year of trial start | |||||
| 2006 | 9321 | 1376 (14.8) | 4585 (49.2) | 263 (2.8) | 3240 (34.8) |
| 2007 | 11122 | 1247 (11.2) | 5462 (49.1) | 275 (2.5) | 4284 (38.5) |
| 2008 | 13942 | 1333 (9.6) | 7046 (50.5) | 327 (2.3) | 5385 (38.6) |
| 2009 | 13712 | 1162 (8.5) | 6390 (46.6) | 327 (2.4) | 5963 (43.5) |
| 2010 | 13816 | 1113 (8.1) | 5923 (42.9) | 309 (2.2) | 6595 (47.7) |
| 2011 | 14202 | 1057 (7.4) | 5839 (41.1) | 320 (2.3) | 7127 (50.2) |
| 2012 | 15468 | 1015 (6.6) | 5738 (37.1) | 344 (2.2) | 8507 (55.0) |
| 2013 | 16217 | 1074 (6.6) | 5355 (33.0) | 363 (2.2) | 9566 (59.0) |
| 2014 | 18400 | 1048 (5.7) | 6550 (35.6) | 339 (1.8) | 10 597 (57.6) |
| % Difference (95% CI)d,e | −9.1 (−9.9 to −8.3) | −13.6 (−14.8 to −12.3) | −1.0 (−1.4 to −0.6) | 22.8 (21.6 to 24.0) | |
| Absolute difference, No. (%)e | 9079 (97.4) | −328 (−23.8) | 1965 (42.9) | 76 (28.9) | 7357 (227.1) |
a
Data as of June 26, 2015.
b
One trial may have more than 1 funding source.
c
Unless otherwise indicated.
d
All comparisons yielded P values of <.001.
e
Comparisons are between the year 2006 and 2014.