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Observational Studies

Observational Studies

Observational studies are a type of analytical study where researchers observe events without any interventions. In other words, the researcher does not influence the response variable or the experiment's outcome.
There are three types of observational studies – Prospective, retrospective, and cross-sectional.
Prospective Study
Prospective studies, also known as longitudinal or cohort studies, are carried out by collecting future data from groups sharing similar characteristics. One...

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A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology

A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology

Published on: February 7, 2015

Research methods for retrospective analyses in vascular surgery.

Thomas W Cheng¹, Jeffrey J Siracuse¹

¹Division of Vascular and Endovascular Surgery, Boston Medical Center, Boston University School of Medicine, 88 East Newton Street, Boston, MA 02118.

Seminars in Vascular Surgery

|November 22, 2022

Summary

This review discusses key databases for vascular surgery research, including the Vascular Quality Initiative and others. Understanding these resources and methods is crucial for successful retrospective clinical research and advancing surgical knowledge.

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Area of Science:

Vascular Surgery Research
Clinical Research Methodology
Health Services Research

Background:

Retrospective analyses are vital for advancing vascular surgery knowledge.
Effective clinical research relies on appropriate data sources and methods.
Numerous institutional datasets are available for vascular surgery studies.

Purpose of the Study:

To review commonly used databases in vascular surgery research.
To discuss the advantages and limitations of various data sources.
To guide researchers in selecting optimal resources for retrospective analyses.

Main Methods:

Literature review of existing research methodologies in vascular surgery.
Discussion of prominent institutional data sets: Vascular Quality Initiative (VQI), American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP), National Inpatient Sample (NIS), and Nationwide Readmissions Database (NRD).
Analysis of common clinical research practices including data gathering, literature review, database integration, and statistical analysis.

Main Results:

Identified key databases (VQI, ACS-NSQIP, NIS, NRD) commonly utilized in vascular surgery.
Highlighted that each database possesses unique advantages and limitations.
Emphasized the importance of a clear research question and appropriate data source selection.

Conclusions:

Retrospective clinical research using available databases can significantly advance vascular surgery.
Effective dissemination of findings through presentations and publications is key to research success.
Strategic selection of data sources and methods enhances the impact of vascular surgery research.