IMPERIAL COLLEGE LONDON: To provide a robust alternative assessment of the use of health service resources by patients enrolled in IMPROVE (ISRCTN48334791), a randomised trial of an endovascular strategy v

Data-sharing agreement from NHS Digital registers of approved data releases, 2014–2019. Evidence status: source reported.

Organisation: Imperial College London
Source reference: DARS-NIC-278518-F3H0X-v1.3
Jurisdiction: England
Licence: Open Government Licence v3.0, subject to NHS England terms and exclusions

Register reference: DARS-NIC-278518-F3H0X-v1.3
Agreement period: not published to no end date published
For commercial purposes (as marked in the register): Not stated
Release files listed by NHS England: 16

Data approved

Hospital Episode Statistics Critical Care
Hospital Episode Statistics Admitted Patient Care

Objective, as published

To provide a robust alternative assessment of the use of health service resources by patients enrolled in IMPROVE (ISRCTN48334791), a randomised trial of an endovascular strategy versus open repair for patients with a clinical diagnosis of ruptured abdominal aortic aneurysm. Since the primary outcome of the trial, 30-day mortality, was not different between the two randomised groups (BMJ 2014;348:f7661), accurate longer-term clinical and cost-effectiveness evaluations of the 2 treatments have particular relevance for the NHS. Imperial College London's current source of information on the use of health services after hospital discharge comes primarily from the specialist vascular centres participating in the trial (where patients had their ruptured aneurysms repaired). Re-admissions to non-trial hospitals are not captured. To enhance the generalisability and robustness of clinical and cost-effectiveness evaluations, IMPROVE trial Management Committee wish to cross-check both aneurysm-related re-interventions and hospital re-admissions (any hospital for any reason) data, to validate and supplement the information collected from relevant trial hospitals with HES admissions/procedures data. The aneurysm-related re-interventions include procedures directly related to the aorta and distal arteries (L procedure codes) and procedures which arise as a result of damaged bowel or abdominal wall during aneurysm repair (including some G, H and T procedure codes). HES data for admissions,…

Expected benefits, as published

1. To add to the accuracy of the cost-effectiveness and the incremental net benefit of an endovascular strategy for repair of ruptured abdominal aortic aneurysm: 2016-2017. 2. To benefit all future patients admitted to hospital with a diagnosis of ruptured abdominal aortic aneurysm. 3 To drive organisational changes, so that endovascular repair becomes available to all patients with ruptured abdominal aortic aneurysm

Source: https://webarchive.nationalarchives.gov.uk/ukgwa/2019/http://content.digital.nhs.uk/media/23861/Release-Register-December-16---February-17/xls/Release_Register__December_16_-_February_17.xlsx. Captured 2026-10-30.

Limitations: Agreement as recorded in an NHS Digital register of approved data releases (2014–2019), retrieved from the UK Government Web Archive. That register lists releases made in its period and the agreement's purpose statement as it then stood; it gives no agreement dates, and the agreement may have changed since. Imported only where a paper quotes a reference no current register holds.