Table 1

Number of registered clinical studies sponsored by China and the distribution on ICTRP source registries as of December 2018

Source registries	Source of data	Number of registered studies	Number of registered studies sponsored by China
ClinicalTrials.gov	AACT	292 582	12 628
Japan Primary Registries Network	ICTRP	37 801	39
EU Clinical Trials Register	ICTRP	29 798	22
ChiCTR	ICTRP and ChiCTR	20 022	19 483
Iranian Registry of Clinical Trials (IRCT)	ICTRP	19 104	0
ISRCTN	ISRCTN	17 689	226
ANZCTR	ANZCTR	16 846	128
Clinical Trials Registry—India	ICTRP	16 653	10
German Clinical Trials Register	ICTRP	7621	1
The Netherlands National Trial Register	ICTRP	7429	2
Clinical Research Information Service Republic of Korea	ICTRP	3379	0
Brazilian Clinical Trials Registry	ICTRP	2650	0
Thai Clinical Trials Registry	ICTRP	2578	18
Peruvian Clinical Trial Registry	ICTRP	1761	0
Pan African Clinical Trial Registry	ICTRP	1756	0
Cuban Public Registry of Clinical Trials	ICTRP	295	0
Sri Lanka Clinical Trials Registry	ICTRP	295	0
Lebanese Clinical Trials Registry	ICTRP	2	0
Total		478 261	32 557

Data note: Exact registration year was not available in 96 entries on IRCT, so these entries were excluded from the analysis.
AACT, aggregate analysis of ClinicalTrials.gov; ANZCTR, Australian New Zealand clinical trials registry; ChiCTR, Chinese Clinical Trial Registry; ICTRP, International clinical trials registry platform; ISRCTN, International standard randomised controlled trial number.