Table 2.

Types of registries and data and their descriptions.

Type of registry or data	Descriptiona
National prison registries	National prison registries include a range of personal data on people imprisoned in each country, including age, gender, convictions and sentences, and the actual time spent in prison. The registries also include some information on participation in correctional interventions.
National cause of death registries	National cause of death registries include the cause of death based on the ICD-10b. The registries include all residents of the country at the time of death. The registries are based on death certificates and information that is coded at a national level.
National prescription databases	National prescription databases contain information on all prescription drugs, whether reimbursed or not, dispensed by pharmacies to individual patients. All drugs are classified according to the Anatomical Therapeutic Chemical classification system.
National patient registries	National patient registries include information on all patients receiving hospital-level care in both inpatient and outpatient facilities and acute and emergency services for mental and somatic illnesses. The national patient registries also include birth date, county of residence, date of admission, date of discharge, and primary and secondary diagnoses, according to the ICD-10.
Police and crime registries	Police and crime registries include information on all registered criminal cases, including identified offenders. They provide data on several prosecuting decisions, such as formal charges leading to conviction, formal charges leading to acquittal, and fines. In addition, these registries contain dates for offences and convictions.
Data on socioeconomic conditions	Data on socioeconomic conditions include information on employment, income, and social benefits.

^aThe registry descriptions are intended as an overview and may vary across countries.

^bICD-10: International Classification of Diseases, Tenth Revision.