An observational study utilising data from the US Tysabri TOUCH programme and select EU MS Registries to estimate the risk of progressive multifocal leukoencephalopathy (PML) and other serious opportunistic infections among patients who were exposed to an MS disease modifying treatment prior to treatment with Tysabri

ENCePP Code of conduct

No

Data sources

• Data sources (types):
  Disease registry

Use of a Common Data Model (CDM)

• CDM mapping:
  No

Data quality specifications

• Check conformance:
  Unknown
• Check completeness:
  Unknown
• Check stability:
  Unknown
• Check logical consistency:
  Unknown

Data characterisation

• Data characterisation conducted:
  No