Variation Between Hospitals in Short-term Mortality After Acute Coronary Syndromes: A CALIBER Study
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ClinicalTrials.gov Identifier: NCT01111071 |
Recruitment Status :
Completed
First Posted : April 27, 2010
Last Update Posted : May 12, 2016
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Condition or disease |
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Acute Coronary Syndrome |
Several studies have looked at between-hospital variation in mortality following myocardial infarction but have lacked patient-level data. Those with individual-level data have been limited by:
- use of in-hospital mortality as an outcome measure, which can be affected by length of stay,
- restriction to patients aged 65 and over, or otherwise selected patients, and
- patient-level explanatory factors lacking clinical detail, particularly medications given in hospital.
MINAP patient-level data allow the investigation of hospital variation in mortality (in-hospital and 30-day) in a group of unselected patients, taking into account clinical details such as medication use in hospital, as well as features of the hospitals providing care. The proposed study will establish the extent of variation between hospitals in England and Wales, whether this varies by ACS diagnosis, whether the variation has reduced over time and finally which patient-level or hospital-level factors explain any variation found.
A statistical analytic protocol for this study, dated 15.4.2010, is available on request.
This study is part of the CALIBER (Cardiovascular disease research using linked bespoke studies and electronic records) programme funded over 5 years from the NIHR and Wellcome Trust. The central theme of the CALIBER research is linkage of the Myocardial Ischaemia National Audit Project (MINAP) with primary care (GPRD) and other resources. The overarching aim of CALIBER is to better understand the aetiology and prognosis of specific coronary phenotypes across a range of causal domains, particularly where electronic records provide a contribution beyond traditional studies. CALIBER has received both Ethics approval (ref 09/H0810/16) and ECC approval (ref ECC 2-06(b)/2009 CALIBER dataset).
Study Type : | Observational |
Actual Enrollment : | 316648 participants |
Time Perspective: | Prospective |
Official Title: | Variation Between Hospitals in Short-term Mortality After Acute Coronary Syndromes: A CALIBER Study |
Study Start Date : | April 2010 |
Actual Primary Completion Date : | September 2014 |
Actual Study Completion Date : | December 2014 |

Group/Cohort |
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STEMI
patients with discharge diagnosis of ST elevation myocardial infarction
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nSTEMI
patients with discharge diagnosis of non ST elevation myocardial infarction
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unstable angina
patients with discharge diagnosis of unstable angina
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- all-cause 30-day mortality [ Time Frame: 30 day ]all-cause 30-day mortality following hospitalisation for acute coronary syndrome
- all-cause in-hospital mortality [ Time Frame: length of hospital stay ]all-cause in-hospital mortality following hospitalisation for acute coronary syndrome

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Ages Eligible for Study: | 30 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Sampling Method: | Non-Probability Sample |
Inclusion Criteria:
- admitted between January 2003 to June 2009 (or latest date data available)
Exclusion Criteria:
- admitted to hospital with fewer than 25 admissions in given year

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01111071
United Kingdom | |
Epidemiology and Public Health, University College London | |
London, United Kingdom, WC1E 6BT |
Principal Investigator: | Julie L George, MSc | University College, London |
Publications:
Responsible Party: | Julie George, NIHR Doctoral Fellow, University College, London |
ClinicalTrials.gov Identifier: | NCT01111071 |
Other Study ID Numbers: |
CALIBER-09-03 RP-PG-0407-10314 ( Other Grant/Funding Number: National Institute of Health Research (UK) ) |
First Posted: | April 27, 2010 Key Record Dates |
Last Update Posted: | May 12, 2016 |
Last Verified: | May 2016 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Plan Description: | permissions to use anonymised data from data owners do not allow further sharing. |
hospital variation 30 day mortality in hospital mortality acute coronary syndrome |
myocardial infarction unstable angina hospital performance trends |
Acute Coronary Syndrome Syndrome Disease Pathologic Processes |
Myocardial Ischemia Heart Diseases Cardiovascular Diseases Vascular Diseases |