Association of Obesity and Cardiovascular Outcomes in Myocardial Infarction (Paradox)

July 26, 2023 updated by: Kwang-No Lee, Ajou University School of Medicine

Association of Obesity and Cardiovascular Outcomes in Patients With Myocardial Infarction : a Korean Nationwide Cohort Study

In this study, the investigators evaluated the association between various measures of adiposity [BMI and waist circumference (WC)] and clinical outcomes in Asian patients with Myocardial Infarction who underwent percutaneous coronary intervention or bypass surgery, using a nationwide population based cohort.

Study Overview

Status

Active, not recruiting

Conditions

Intervention / Treatment

Detailed Description

This retrospective nationwide cohort study used administrative claims data from the Korean National Health Insurance Service (NHIS) and the combined health check-up database of the National Health Insurance Corporation between 2013 and 2020.

The investigators included patients newly diagnosed with MI and underwent revascularization (PCI or CABG) between January 2015 and December 2020. Patients aged <20 years, those who were already diagnosed with MI before 2015, and those with cancer were excluded from the analysis. The follow-up period was defined as the time from the index date (date of diagnosis) to each outcome event, date of death, or end of the study period (December 31, 2020), whichever came first.

Patients' demographic data, comorbidities, concomitant medications, and income level were collected from the Korean NHIS database. The recent health check-up data from the index date was also ascertained, including height, weight, waist circumference, blood pressure, health surveys, and laboratory exam. Health survey included family history, smoking history, alcohol history, and the level of individual physical activity.

According to BMI following the World Health Organization recommendation for Asian population, study patients were categorized into 5 groups: underweight, <18.5 kg/m2; normal range, 18.5 to <23 kg/m2; overweight, 23 to <25 kg/m2; obese I, 25 to <30 kg/m2; and obese II, ≥30 kg/m2[4]. The investigators defined the proportion of medical use by calculating formula with the recuperation cost and the number of the visit to hospitals.

During the follow-up period, The investigators assessed 3 clinical outcomes, including all-cause death, cardiovascular hospitalization and the recurrence rate. Clinical outcomes were mainly defined by the the International Classification of Diseases, 10th revision (ICD-10). Patients were censored at the clinical outcomes or the end of the study period (December 31, 2020), whichever came first.

All categorical variables are presented as frequencies and percentages. Normally distributed data were presented as mean ± standard deviation, whereas nonparametric data are presented as median and interquartile range by BMI.

Cox proportional hazard regression analyses were performed to identify the association of BMI with the primary and secondary outcomes, calculating hazard ratio (HR) and 95% confidence interval (CI) and adjusting for the following potential confounders: sex, age, systolic blood pressure, fasting glucose level, total cholesterol level, alcohol consumption, smoking status, physical activity, household income, use of antihypertensive agents, use of statins, use of antiplatelet agents, previous history of MI, previous history of stroke, and index year. All analyses were conducted using R-statistics.

Study Type

Observational

Enrollment (Estimated)

60000

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Korea, Republic of
    • Gyeong-gido
      • Suwon, Gyeong-gido, Korea, Republic of, 16499
        • Ajou University School of Medicine

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

20 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

We included patients newly diagnosed with MI and underwent revascularization (PCI or CABG) between January 2015 and December 2020. Patients aged <20 years, those who were already diagnosed with MI before 2015, and those with cancer were excluded from the analysis. The follow-up period was defined as the time from the index date (date of diagnosis) to each outcome event, date of death, or end of the study period (December 31, 2020), whichever came first.

Description

Inclusion Criteria:

  • Patients newly diagnosed with MI and underwent revascularization (PCI or CABG) between January 2015 and December 2020.

Exclusion Criteria:

  • Patients aged <20 years
  • Patients diagnosed with MI before 2015
  • Patients with cancer

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Other

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Patients with MI who underwent revascularization during study period
Patients newly diagnosed with MI and underwent revascularization (PCI or CABG) during study period
Procedure: Percutaneous coronary intervention (PCI)
Patients who underwent percutaneous coronary intervention (PCI), including percutaneous transluminal coronary angioplasty (PTCA), and coronary stent insertion
Other Names:
  • Coronary intervention therapy
Procedure: Coronary artery bypass grafting (CABG)
Patients who underwent coronary artery bypass grafting (CABG)
Other Names:
  • Coronary graft surgery

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
MACE
Time Frame: 5 years
Thromboembolism + Death + CV hospitalization
5 years

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Death
Time Frame: 5 years
Mortality
5 years
CV hospitalization
Time Frame: 5 years
Admission caused by Cardiovacular disease
5 years
Thromboembolism
Time Frame: 5 years
Recurrent myocardial infarction, Stroke
5 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Ajou University School of Medicine

Investigators

  • Study Chair: Kwang-No LEE, Ajou University School of Medicine

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

July 1, 2022

Primary Completion (Estimated)

October 31, 2024

Study Completion (Estimated)

December 31, 2024

Study Registration Dates

First Submitted

December 2, 2022

First Submitted That Met QC Criteria

December 2, 2022

First Posted (Actual)

December 12, 2022

Study Record Updates

Last Update Posted (Actual)

July 27, 2023

Last Update Submitted That Met QC Criteria

July 26, 2023

Last Verified

July 1, 2023

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • AJOUIRB-EXP-2021-398-2

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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