TABLE 2.

Characteristics of included databases by data custodians (scoping review, China, 1946–2020).

	Data custodian
	Government agencies	Research institutes/universities	Other
Details of owners	Mainly owned by CDC and CDC affiliated institutes, such as National Institute for Communicable Disease Prevention and Control, National Institute for Nutrition and Health etc.	Independent research institutes and university affiliated institutes	Mainly hospitals leading specific disease registries
Types of diseases covered	Majority of communicable diseases and common NCD databases and all databases of injuries and maternal and child health	Disease registries of NCDs	Disease registries of NCDs with relatively lower prevalence such as rare disease registries
Types of databases	Surveillance	Disease registry	Disease registry
Aggregated data availability	Aggregated data available online without application, for most of the CDC owned databases	Only small numbers of databases with aggregated data available online	Mostly unknown availability
Individual data availability	Most of the CDC owned databases are publicly available and individual records are available by application with potential cost if data requires extra processing or data are requested in non-electronic forms; some databases only have aggregated data available and the availability of individual records is unknown	Mostly unknown	Mostly unknown