Table 3.

Adjusted odds for on-time registration of studies on Clinicaltrials.gov

	p Value	Adjusted OR*	95% CI
Sexes of subjects included
Females only	Reference
Males only	0.18	0.9	0.8 to 1.0
Females and males	0.08	1.1	1.0 to 1.2
Age groups included
Adults	Reference
Adults and children	0.18	1.0	0.9 to 1.0
Children only	0.46	1.0	0.9 to 1.1
Year of registration
1999	Reference
2000	<0.001	11.5	8.8 to 15.0
2001	<0.001	8.9	6.8 to 11.6
2002	<0.001	9.1	7.0 to 11.9
2003	<0.001	11.9	9.2 to 15.4
2004	<0.001	11.8	9.1 to 15.2
2005	<0.001	5.5	4.3 to 7.0
2006	<0.001	15.5	12.2 to 19.7
2007	<0.001	15.6	12.3 to 19.8
2008	<0.001	19.9	15.7 to 25.2
2009	<0.001	31.4	24.8 to 39.9
2010	<0.001	42.3	33.3 to 53.8
2011	<0.001	46.8	36.4 to 60.3
Study phase
Phase I	Reference
Phase II	<0.001	1.2	1.2 to 1.3
Phase III	<0.001	1.2	1.1 to 1.3
Phase IV	<0.001	0.8	0.7 to 0.9
Source of funding
Industry only	Reference
Non-industry only	<0.001	0.6	0.6 to 0.7
Blended	<0.001	0.8	0.8 to 0.9

*Logistic regression model included the following covariates: sex composition of subjects; age groups; year of registration; study phase; and source of funding.