Skip to content

Long-term follow-up of participants in the electronic health records from the SEARCH Study

SEARCH trial legacy study: Long-term follow-up of participants using electronic health records

Status
Recruiting
Phases
Unknown
Study type
Observational
Source
ISRCTN
Registry ID
ISRCTN14416153
Enrollment
12064
Registered
2022-08-25
Start date
2022-06-15
Completion date
Unknown
Last updated
2026-02-09

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Cardiovascular disease, dementia, cancer Other

Interventions

Record-level electronic health data will be requested from NHS England and equivalent registries in Scotland & Wales. These records will be used to follow up on the original SEARCH cohort for an exten

Sponsors

University of Oxford
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 75 Years

Inclusion criteria

Inclusion criteria: Participants were part of the original SEARCH cohort (randomised between 1998 and 2001). They were between 18 and 75 years old when invited to participate. Participants had to fulfil all of the following criteria: 1. History of prior myocardial infarction 2. Current use of a statin or clear indication for statin therapy 3. No clear indication for folic acid 4. No clear contraindications to the study treatments 5. No other medical problem For inclusion into the legacy cohort, participants had to be residents of the UK

Exclusion criteria

Exclusion criteria: 1. Participants who have opted out of having their data provided by NHS England 2. Participants who have read the privacy notice and have decided that they do not want their data used in this study

Design outcomes

Primary

MeasureTime frame
The first planned analyses will be based on at least 15 years’ follow-up from trial initiation with further analyses planned at approximately 5 yearly intervals based on ongoing linkage to NHS records. Appropriate analysis methods will be used to compare the risk ratios for first occurrence post-randomisation of each outcome of interest (dementia, stroke, all major cardiovascular disorders, other vascular disease complications, myopathies, heart failure, renal impairment, other health and care outcomes and death) between both allocated treatment groups.

Secondary

MeasureTime frame
There are no secondary outcome measures

Countries

England, United Kingdom

Contacts

Public ContactMichelle Nunn
michelle.nunn@ndph.ox.ac.uk+44 (0)1865 743743

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 15, 2026