Factors related to posting of study results on Clinicaltrials.gov for US-based Phase II, II or IV industry sponsored studies*
| p value | Adjusted OR | 95% CI | |
|---|---|---|---|
| Sexes of subjects included | |||
| Females only | Reference | ||
| Males only | 0.2 | 1.4 | 0.8 to 2.5 |
| Females and males | 0.9 | 1.0 | 0.7 to 1.4 |
| Age groups included | |||
| Adults | Reference | ||
| Adults and children | 0.1 | 1.2 | 0.9 to 1.6 |
| Children only | <0.001 | 2.9 | 2.1 to 4.0 |
| Year trial completed | |||
| 2007 | Reference | ||
| 2008 | <0.001 | 1.5 | 1.1 to 2.0 |
| 2009 | 0.7 | 1.1 | 0.8 to 1.5 |
| 2010 | <0.001 | 0.6 | 0.4 to 0.9 |
| Study phase | |||
| Phase II | Reference | ||
| Phase III | <0.001 | 3.4 | 2.8 to 4.1 |
| Phase IV | <0.001 | 6.0 | 4.6 to 7.2 |
*Analysis set limited to industry-sponsored, US-based, intervention studies at Phase II or beyond for which the study completion date listed on clinicaltrials.gov fell between 28 September 2007 and 23 June 2010, inclusive. The final model included the following covariates: gender of subjects; age group of subjects; year of study completion; and study phase.