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NCT02626156: MUSTCOOL

Cooling Leg and Foot Ulcer Skin Post Healing to Prevent Ulcer Recurrence

Completed Phase 2 Results posted Last updated 30 June 2021
What this trial tests

Phase 2 trial testing Cooling gel pack in Venous Hypertension Ulcers in 140 participants. Completed in 31 March 2020.

Timeline
1 June 2015
Primary endpoint
31 March 2020
31 March 2020

Quick facts

Lead sponsorMedical University of South Carolina
PhasePhase 2
StatusCompleted
Study typeINTERVENTIONAL
Allocationrandomized
Designparallel
Maskingdouble
Primary purposetreatment
Enrollment140
Start date1 June 2015
Primary completion31 March 2020
Estimated completion31 March 2020
Sites2 locations across United States

Drugs / interventions tested

Conditions studied

Sponsor

Medical University of South Carolina

Who can join

50 and older, any sex, with Venous Hypertension Ulcers or Venous Stasis Ulcer. Patients with the condition only — healthy volunteers not accepted.

Results — posted to ClinicalTrials.gov

Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.

Number of Participants With Ulcer Recurrence Primary · Through study completion at 6 months from baseline

Number of recurrent ulcers that develop during the 6 month study period for in participants for 4 groups of patients with previously healed venous leg ulcers receiving the cooling gel pack and cooling cotton pack and those with previously healed diabetic foot ulcers receiving the cooling gel pack or cooling cotton pack.

GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer6
Cooling Cotton Pack - Venous Leg Ulcer3
Cooling Gel Pack - Diabetic Foot Ulcer11
Cotton Cooling Pack - Diabetic Foot Ulcer5
Change in Pain (Worst Pain, Least Pain, Pain Now) Primary · Through study completion at 6 months from baseline

Pain was measured with a visual analog scale and reported numerically (0 to 10 with 10 being the most severe pain) at baseline and at 6 months end of study

Worst pain
GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer0.85-0.1 – 1.6
Cooling Cotton Pack - Venous Leg Ulcer0.4-0.6 – 1.3
Cooling Gel Pack - Diabetic Foot Ulcer0-1.6 – 1.6
Cooling Cotton Pack - Diabetic Foot Ulcer-1.0-2.3 – 0.3
Least pain
GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer0.3-0.2 – 0.8
Cooling Cotton Pack - Venous Leg Ulcer0-0.6 – 0.6
Cooling Gel Pack - Diabetic Foot Ulcer-0.1-0.8 – 0.6
Cooling Cotton Pack - Diabetic Foot Ulcer00 – 0
Pain now
GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer0.4-0.06 – 0.9
Cooling Cotton Pack - Venous Leg Ulcer0.14-0.3 – 0.5
Cooling Gel Pack - Diabetic Foot Ulcer0.1-0.1 – 0.3
Cooling Cotton Pack - Diabetic Foot Ulcer-0.1-0.4 – 0.1
Differences in Step Counts Primary · Through study completion at 6 months from baseline

Differences in step counts reported via accelerometer data, from baseline to post treatment at 6 months end of intervention for the 4 groups.

GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer172959259 – 25332
Cooling Cotton Pack - Venous Leg Ulcer142346874 – 21593
Cooling Gel Pack - Diabetic Foot Ulcer132322909 – 23555
Cotton Cooling Pack - Diabetic Foot Ulcer154795614 – 25343
Change in Mean Scores on Quality of Life Measured With the VEINES QOL/Sym Questionnaire Primary · Through study completion at 6 months from baseline

The Venous Insufficiency Epidemiological and Economic Study-Quality of life/Symptoms (VEINES QOL/Sym) Questionnaire was used to evaluate quality of life. A sum score is provided as an overall quality of life score for both the QOL and Sym portions of the questionnaire. This instrument was used only for the VLU groups because it is a disease-specific measure. Of the 26 items in the questionnaire, 25 items are combined to create a summary score (VEINES-QOL). One item which asks about the time of day the leg problem is most intense, question 2, provides only descriptive information and is not sco

Quality of life
GroupValue95% CI
Cooling Gel Pack13.84.0 – 23.5
Cooling Cotton Pack-4.8-121.6 – 111.9
Symptoms
GroupValue95% CI
Cooling Gel Pack24.213.8 – 34.5
Cooling Cotton Pack-4.3-7.4 – -1.1
Changes in Severity and Intensity Pain Scores Measured With the Brief Pain Inventory Primary · Through study completion at 6 months from baseline

The Brief Pain Inventory (BPI) scale is reported as an average score. BPI rapidly assesses the severity of pain and its impact on functioning for intensity and Pain Intensity and Pain Interference. Pain Intensity is measured in four categories: worst, least, on average, and currently, while Pain Interference is measured in 7 categories: mood, work, general activity, walking, relationships, enjoyment of life, and sleep. The patient rates each of these on a scale from 0-10, 10 being excruciating pain intensity and a complete interference in their life. Subscores are determined by averaging over

Severity
GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer-0.5-1.0 – 0.01
Cooling Cotton Pack - Venous Leg Ulcer-0.2-0.8 – 0.4
Cooling Gel Pack - Diabetic Foot Ulcer0-0.5 – 0.5
Cotton Cooling Pack - Diabetic Foot Ulcer0.4-0.1 – 0.9
Interference
GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer-0.4-0.8 – 0.08
Cooling Cotton Pack - Venous Leg Ulcer-0.5-1.1 – 0.1
Cooling Gel Pack - Diabetic Foot Ulcer-0.1-0.2 – 0.1
Cotton Cooling Pack - Diabetic Foot Ulcer0.1-0.2 – 0.3
Change in METS Minutes Engaging in Physical Activity Measured With The International Physical Activity Questionnaire Primary · Through study completion at 6 months from baseline

Change in metabolic equivalent of task (METS) min per week for physical activity per The International Physical Activity Questionnaire reported for 4 groups from baseline to 6 months end of study. Scoring HIGH indicate physical activity levels equate to \~1hour of activity per day or more at least moderate intensity level or engage in vigorous intensity activity on at least 3 days achieving a minimum total physical activity of at least 1500 MET min a week or 7 or more days of any combination of walking, moderate intensity or vigorous intensity activities achieving a minimum total physical acti

GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer73-623 – 767
Cooling Cotton Pack - Venous Leg Ulcer799-507 – 2104
Cooling Gel Pack - Diabetic Foot Ulcer19211151 – 4993
Cooling Cotton Pack - Diabetic Foot Ulcer225-255 – 705
Time Spent in Minutes Engaging in Physical Activities Primary · Through study completion at 6 months from baseline

Mean time spent in minutes engaging in physical activities, reported via accelerometer data, from baseline to post treatment at 6 months end of intervention for the 4 groups.

GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer1420-2448 – 5288
Cooling Cotton Pack - Venous Leg Ulcer2523-765 – 5811
Cooling Gel Pack - Diabetic Foot Ulcer13528 – 242
Cotton Cooling Pack - Diabetic Foot Ulcer15755 – 260
Participant Adherence to the Study Protocol Secondary · Daily measures starting at baseline for temperature and every other day cooling application during the 6-month study period.

Using study data logs, appropriate use of the thermometer and cooling pack was measured by the number of participants who adhered to the protocol for taking the temperature of the skin over the healed venous leg or diabetic foot ulcer. Adherence was defined as: the number of participants who were at least 80% adherent to taking their temperatures with the infrared thermometer each morning and the number of participants who were at least 80% adherent to performing the intervention every other day = 3 times times per week during the 6-month study period.

Temperature
GroupValue95% CI
Adherence106
Cooling
GroupValue95% CI
Adherence82
Number of Participants Indicating 'Yes' or 'Easy' on Study Instructions, Thermometer Use, Completing Logs, Performing Treatment, Helpfulness Secondary · Survey conducted at end of the 6-month study period.

Patients satisfaction was measured by study personnel a during end of study phone survey with the following questions asked as follows (Yes/No): Were study instructions adequate, was thermometer easy to use, found cooling helpful, would cool skin area if it was proven that cooling prevented reulceration; (Easy/Not Easy): completing logs, performing the cooling treatment. Data are for (Yes/No) as number of participants who reported "yes" or if (Easy/Not Easy) the number of participants who reported "easy."

Study Instructions Adequate - Yes
GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer36
Cooling Cotton Pack - Venous Leg Ulcer34
Cooling Gel Pack - Diabetic Foot Ulcer26
Cotton Cooling Pack - Diabetic Foot Ulcer25
Using Thermometer Easy - Yes
GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer36
Cooling Cotton Pack - Venous Leg Ulcer32
Cooling Gel Pack - Diabetic Foot Ulcer27
Cotton Cooling Pack - Diabetic Foot Ulcer25
Completing Logs - Easy
GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer36
Cooling Cotton Pack - Venous Leg Ulcer33
Cooling Gel Pack - Diabetic Foot Ulcer27
Cotton Cooling Pack - Diabetic Foot Ulcer25
Performing Cooling -Treatment - Easy
GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer35
Cooling Cotton Pack - Venous Leg Ulcer31
Cooling Gel Pack - Diabetic Foot Ulcer26
Cotton Cooling Pack - Diabetic Foot Ulcer24
Cooling Helpful - Yes
GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer31
Cooling Cotton Pack - Venous Leg Ulcer21
Cooling Gel Pack - Diabetic Foot Ulcer21
Cotton Cooling Pack - Diabetic Foot Ulcer18
Would Cool if Found to Prevent Re-Ulceration - Yes
GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer34
Cooling Cotton Pack - Venous Leg Ulcer33
Cooling Gel Pack - Diabetic Foot Ulcer24
Cotton Cooling Pack - Diabetic Foot Ulcer25
Knowledge Questionnaire of Study Instructions Secondary · Baseline after participant enrollment

Participants were administered a 12-item (yes/no) questionnaire (test) during instruction at the start of the study, provided by the research personnel to determine comprehension of the protocol and to reinforce study procedures. Score of 12 or 100% was given for all items scoring correctly (1 point per item). Any items for which "no" was answered, remediation was conducted by study personnel at the time the questionnaire was conducted. Means scores are reported per VLU and DFU cooling pack intervention and VLU and DFU cotton cooling pack control.

GroupValue95% CI
Cooling Gel Pack - Venous Leg Ulcer11.711 – 12
Cooling Cotton Pack - Venus Leg Ulcer11.911 – 12
Cooling Gel Pack - Diabetic Foot Ulcer11.811 – 12
Cotton Gel Pack - Diabetic Foot Ulcer11.911 – 12

Adverse events — posted to ClinicalTrials.gov

Time frame: Data were collected for each participant for 6 months during study enrollment period.. Reporting threshold: 0%. Adverse-event reports describe events observed during the trial — not all are caused by the drug.

Cooling Gel Pack - Venous Leg Ulcer
Serious: 4/42 (10%)
Deaths: 1/42
Cooling Cotton Pack - Venous Leg Ulcer
Serious: 2/40 (5%)
Deaths: 0/40
Cooling Gel Pack - Diabetic Foot Ulcer
Serious: 3/29 (10%)
Deaths: 0/29
Cooling Cotton Pack - Diabetic Foot Ulcer
Serious: 4/29 (14%)
Deaths: 0/29

Serious adverse events (7 terms)

ReactionSystemCooling Gel Pack - Venous …Cooling Cotton Pack - Veno…Cooling Gel Pack - Diabeti…Cooling Cotton Pack - Diab…
Heart attack or failureCardiac disorders
Shortness of breathRespiratory, thoracic and mediastinal disorders
AmputationVascular disorders
StrokeVascular disorders
InfectionInfections and infestations
FaintedEar and labyrinth disorders
Renal cancerNeoplasms benign, malignant and unspecified (incl cysts and polyps)
Other adverse events (6 terms — click to expand)

ReactionSystemCooling Gel Pack - Venous …Cooling Cotton Pack - Veno…Cooling Gel Pack - Diabeti…Cooling Cotton Pack - Diab…
Recurrent ulcersSkin and subcutaneous tissue disorders
New ulcersSkin and subcutaneous tissue disorders
SurgerySurgical and medical procedures
InjuryInjury, poisoning and procedural complications
RashSkin and subcutaneous tissue disorders
InfectionInfections and infestations

Most-reported serious reactions: Heart attack or failure, Shortness of breath, Amputation, Stroke, Infection, Fainted, Renal cancer.

Data from ClinicalTrials.gov NCT02626156 adverse events section.

Sponsor's own description

The goal of this study is to test MUSTCOOL, a home-based self-monitoring and self-management ulcer prevention intervention for patients with newly healed chronic venous leg and diabetic foot ulcers. Almost 90% of ulcers recur within 3 months of healing. During the six-month randomized clinic trial, skin temperature will be monitored daily, a maintenance dose of cooling gel pack or placebo will be applied three times weekly to the affected skin, and a bolus dose of cooling will be applied for 5 consecutive days if skin temperature becomes elevated. Outcomes on the incidence of leg ulcer recurrence, pain, physical activity and quality of life will be measured.

Publications & conference data

2 peer-reviewed publications reference this trial (live from Europe PMC):

  1. Cooling Intervention (MUSTCOOL) for Prevention of Lower Extremity Ulcer Recurrence: A Randomized Controlled Trial.
    Kelechi TJ, Madisetti M, Prentice M, Mueller M. · · 2021 · cited 5× · PMID 33735146 · DOI 10.1097/won.0000000000000753
  2. Efficacy of a Self-managed Cooling Intervention for Pain and Physical Activity in Individuals With Recently Healed Chronic Venous Leg and Diabetic Foot Ulcers: A Randomized Controlled Trial.
    Kelechi TJ, Mueller M, Madisetti M, Prentice M. · · 2022 · cited 1× · PMID 35507774 · DOI 10.1097/won.0000000000000880

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