Table 1.
List of data sources retained in the final inventory (by year)
| Data source name | Country | Type | Type of care | Start date |
| Finnish National Registries | Finland | Record linkage system | Mixed | 1964 |
| Swedish National Registries | Sweden | Record linkage system | Mixed | 1970 |
| Danish National and Regional Registries | Denmark | Record linkage system | Mixed | 1977 |
| The electronic Data Research and Innovation Service | Scotland | Record linkage system | Mixed | 1981 |
| Clinical Practice Research Datalink | UK | Electronic medical records | Primary care | 1987 |
| QResearch | UK | Electronic medical records | Primary care | 1989 |
| Information System of Parc de Salut del Mar | Spain | Electronic medical records | Primary care | 1990 |
| Medicines Monitoring Unit Scotland | Scotland | Record linkage system | Mixed | 1990 |
| PHARMO Database Network | Netherlands | Record linkage system | Mixed | 1990 |
| QuintilesIMS Disease Analyser | Germany | Electronic medical records | Mixed | 1992 |
| Integrated Primary Care Information Database | Netherlands | Electronic medical records | Primary care | 1995 |
| Agencia Regionale di Sanita Tuscany database | Italy | Claims | Secondary care | 1996 |
| Norwegian Registries | Norway | Record linkage system | Mixed | 1997 |
| QuintilesIMS Disease Analyser | France | Electronic medical records | Primary care | 1997 |
| Region Emilia Romagna Database | Italy | Claims | Secondary care | 1997 |
| Hospital Information System—Lazio | Italy | Claims | Secondary care | 1998 |
| Icelandic Registries | Iceland | Record linkage system | Mixed | 1998 |
| Pedianet Database | Italy | Electronic medical records | Primary care | 1998 |
| Securite Sociale de l’Assurance Maladie | France | Claims | Mixed | 1999 |
| Lombardia Health Database | Italy | Electronic medical records | Secondary care | 2000 |
| QuintilesIMS Longitudinal Patient Database (LPD) | Italy | Electronic medical records | Primary care | 2000 |
| QuintilesIMS LifeLink: Hospital Disease Database—Belgium | Belgium | Electronic medical records | Secondary care | 2001 |
| QuintilesIMS LPD Health Search Database | France | Electronic medical records | Mixed | 2001 |
| Base de Datos para la Investigación Farmacoepidemiológica en Atención Primaria | Spain | Electronic medical records | Primary care | 2002 |
| Caserta Database | Italy | Claims | Primary care | 2002 |
| The Health Improvement Network | UK | Electronic medical records | Primary care | 2002 |
| German Pharmacoepidemiological Research Database | Germany | Claims | Mixed | 2004 |
| Echantillon Généraliste de Bénéficiaires | France | Claims | Mixed | 2006 |
| QuintilesIMS LPD Health Search Database Longitudinal | Spain | Electronic medical records | Mixed | 2006 |
| The Information System for the Development of Research in Primary Care | Spain | Electronic medical records | Primary care | 2006 |
| VEKTIS | Netherlands | Claims | Mixed | 2006 |
| Secure Anonymised Information Linkage | Wales | Record linkage system | Mixed | 2007 |
| National Health Fund | Poland | Claims | Mixed | 2008 |
| Hospital Treatment Insights | UK | Record linkage system | Secondary care | 2010 |