SHOWME-PAD (Peripheral Artery Disease)

April 10, 2023 updated by: Saint Luke's Health System

SHOW-ME PAD (Peripheral Artery Disease)

The overall goal of SHOWME-PAD is to make the existing evidence-base on treatment outcomes -focusing on health status outcomes that reflect the patients' perspective - more transparently available to patients and providers, such that more informed, evidence-based shared treatment decisions occur. INTEGRITY-PAD has the potential to radically reorganize care delivery to patients with PAD such that more value for the patient and society will be created.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

Peripheral arterial disease (PAD) is a burdensome condition that affects 10% of the population and increases to 15-20% among those ≥70 years. In PAD, the underlying pathophysiologic process, atherosclerosis, presents itself as blockages in patients' leg arteries that prevent adequate blood flow and can result in burning calf (or buttock) pain while walking and that is relieved upon rest ('intermittent claudication'). In extreme cases, PAD can progress to critical limb ischemia, characterized by ulceration, gangrene, and threatened limb viability. Patients with PAD have significant atherosclerotic risk factors and impaired health status - thus creating 2 therapeutic goals, prevention of cardiovascular events and improved symptom control and quality of life. While the onset of PAD tends not to be as abrupt as for other cardiovascular conditions, such as stroke or myocardial infarction, leg symptoms can severely affect patients' health status (their symptoms, functional status, and quality of life). In addition, patients' risk of having a cardiovascular event is disproportionately high, as compared with other cardiovascular diseases. One-year cardiovascular event rates - including cardiovascular death, myocardial infarction, or stroke, or other hospitalizations for atherothrombotic events - are estimated to be over 21% in patients with PAD, as compared with 15% for coronary artery disease and stroke.9 Mortality rates are 15-30% 5 years after diagnosis. Part of these disproportionate event rates may be explained by under recognition and under treatment of PAD and its underlying atherosclerotic process. Finally, PAD not only impacts patients' individual lives and their families; it also has a tremendous impact on society at large. It is estimated that annual costs associated with vascular-related hospitalizations in PAD patients in the US exceeds $21 billion.

The primary treatment goals for PAD are symptom relief, quality of life improvement, and cardiovascular risk reduction. Several treatment options are available for PAD, ranging from invasive revascularization procedures, including peripheral percutaneous intervention (PPI) and surgical revascularization to non-invasive options, including supervised and home-based exercise therapy, PAD-specific medications, and cardiovascular risk management. While there is no "gold-standard" treatment for PAD, less invasive options are recommended as a first-choice treatment. Despite these recommendations, invasive procedures are often first offered to patients, with no alternative options being discussed. In treatment scenarios with a lot of clinical equipoise (i.e. uncertainty about what treatment would be best) and a rapidly growing market for newly-introduced technologies, including medical devices for invasive PAD procedures (e.g. stents for endovascular treatment), with limited performance measurement and accountability criteria, there is a high risk of unwanted variation in treatment practices, misallocation of treatments, and unnecessary costs.

Given this context, some of the current challenges in current PAD care include: 1) limited access to the evidence-base in routine clinical care for patients and providers; 2) the potential mismatch of PAD treatments to patient preferences and profiles; and 3) patients not being informed or engaged in medical decision making. These challenges may leave patients uninformed about treatment risks and benefits, increase the risk of misallocating treatments to patients, and may unnecessarily increase costs. A very promising strategy to overcome these challenges is the use of evidence-based, decision support tools. Importantly, it is currently unknown whether patient-centered PAD decision-tools can be designed to improve the alignment of patients' values with respect to their treatment choice and whether these tools can improve patients' knowledge and access to the evidence-base related to PAD treatment and outcomes. The critical next step, therefore, is to create such tools and pilot their implementation as a foundation for broader integration of precision medicine and shared decision-making in clinical care.

Shared decision-making takes into account the latest evidence about all available treatment options and their outcomes, as well as patients' values and preferences with regards to treatment and potential outcomes that matter to them. Shared decision-making is extremely useful in treatment situations where there is clinical equipoise and where the choice of treatment should be greatly influenced by patients' preferences. Decision aids that facilitate this process of shared decision-making, have been consistently associated with better knowledge about the disease and treatments, less decisional conflict, and potential cost savings due to less invasive options being preferred by patients.

Study Type

Interventional

Enrollment (Anticipated)

72

Phase

  • Not Applicable

Contacts and Locations

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

Study Contact

Study Locations

  • United States
    • Missouri
      • Kansas City, Missouri, United States, 64111
        • Recruiting
        • Saint Luke's Hospital of Kansas City
        • Contact:
          • Phone Number: 816-932-5989

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • All race and ethnicity categories, English speaking, men and women
  • Age ≥18 years
  • New onset complaints of PAD symptoms or exacerbation of previous PAD symptoms
  • The diagnostic enrollment criterion includes a positive result for one of the following
  • Doppler resting ankle-brachial index (ABI)≤0.90 or a significant drop in post exercise ankle pressure of ≥20 mmHg.
  • Duplex
  • CTA
  • MRA
  • TCOM
  • Angiogram

Exclusion Criteria:

  • Non-compressible ankle-brachial index (ABI ≥ 1.30)
  • A lower limb revascularization procedure in the ipsilateral leg (same leg) where the patient is currently having symptoms in the past year (atherectomy, endarterectomy, bypass surgery, angioplasty)
  • Peripheral intervention that occurs before the baseline interview
  • Current episode of critical limb ischemia (ischemic rest pain, ulceration or gangrene) (Fontaine III, IV or Rutherford IV-VI)
  • Patients with dementia
  • Patients who are prisoners
  • Patients who are unable to provide informed consent
  • Non-English speaking patients

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

  • Primary Purpose: Other
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Received Decision Tool
Peripheral artery disease patients that received the decision support tool.
Other: Decision Support Tool
Patients enrolled in the study will receive the decision tool prior to the first PAD clinic visit and the medical decision making conversation with the provider.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Decisional Conflict
Time Frame: 6 months
The primary outcome of this study will be decisional conflict as measured by the Decisional Conflict Scale.
6 months

Collaborators and Investigators

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

Sponsor

Saint Luke's Health System

Collaborators

Merck Sharp & Dohme LLC

Investigators

  • Principal Investigator: Kim G Smolderen, PhD, University of Missouri Kansas City; Saint Luke's Hospital

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)

June 24, 2017

Primary Completion (Anticipated)

December 31, 2023

Study Completion (Anticipated)

December 31, 2024

Study Registration Dates

First Submitted

June 14, 2017

First Submitted That Met QC Criteria

June 14, 2017

First Posted (Actual)

June 16, 2017

Study Record Updates

Last Update Posted (Actual)

April 11, 2023

Last Update Submitted That Met QC Criteria

April 10, 2023

Last Verified

April 1, 2023

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 17-053

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

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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