Efficacy and Feasibility of Pain management and Patient Education for Physical Activity in Intermittent claudication (PrEPAID): protocol for a randomised controlled trial

Ukachukwu O Abaraogu, Philippa M Dall, Julie Brittenden, Wesley Stuart, Garry A Tew, Jon Godwin, Christopher A Seenan, Ukachukwu O Abaraogu, Philippa M Dall, Julie Brittenden, Wesley Stuart, Garry A Tew, Jon Godwin, Christopher A Seenan

Abstract

Background: Physical activity (PA) improves functional capacity and quality of life and provides secondary prevention benefits in individuals with peripheral arterial disease (PAD) and intermittent claudication (IC). However, pain and patient lack of knowledge are key barriers to the uptake of, and adherence to, PA recommendations. This trial will test the efficacy and feasibility of a non-invasive pain management intervention with and without patient education to improve PA in individuals with PAD and IC.

Methods: This is a randomised, controlled assessor-blinded feasibility trial with four parallel groups. Eighty adults with PAD and IC will be randomly assigned 1:1:1:1 to Active TENS (transcutaneous electrical nerve stimulation), Placebo TENS, Active TENS + Patient education or Placebo TENS + Patient education groups. All groups will continue to receive usual care over the intervention period. Participants randomised to Active TENS will receive a TENS device (preset at 120 Hz, 200 μs) and will be instructed to use the device daily at home or elsewhere for 6 weeks with a patient-determined intensity of "strong but comfortable". Placebo TENS group participants will receive the same model of TENS device and instructions for use as those in the active group, except that the stimulation dose will be safely altered to produce non-therapeutic, ineffective stimulation. Participants randomised to patient education will receive a one-off 3-h workshop of structured group education (four to five persons in each group) and three sets of twice-weekly phone calls. Efficacy outcomes will be assessed at baseline, after 6 weeks of intervention and at 3 months follow-up. Absolute claudication distance using the Gardner treadmill protocol will be assessed as the primary outcome. Secondary outcomes will assess initial claudication distance, daily PA and patient-reported outcomes including quality of life, pain self-efficacy, depression, disease perception and walking impairment pain intensity and quality. Feasibility outcomes will assess rates of recruitment, retention and adherence. Focus groups with participants at the end of the trial will explore the acceptability of the interventions.

Discussion: This trial will determine the efficacy and feasibility of using a low-cost, CE-marked non-invasive pain management modality delivered with or without a patient-centred education intervention to improve PA in individuals with PAD and IC.

Trial registration: ClinicalTrials.gov, NCT03204825 . Registered on 2 July 2017.

Keywords: Behavioural change therapy; Exercise; Intermittent claudication; Patient-centred care; Peripheral arterial disease; Physical activity; Transcutaneous electrical nerve stimulation.

Conflict of interest statement

Ethics approval and consent to participate

The study protocol was approved by the West of Scotland Research Ethic Committee 4 (17/WS/0094) and the NHS Greater Glasgow and Clyde Clinical Research and Development (GN16CE378). Written informed consent shall be obtained from each trial participant. The Research Nurse or another member of the study team will explain the exact nature of the study in writing and verbally, will provide the participant information sheets and will be responsible for consenting the participants. Trial participants will be informed that they are free to withdraw their consent from the study or study treatment at any time.

Consent for publication

Not applicable.

Competing interests

The authors declare that they have no competing interests.

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Figures

Fig. 1
Fig. 1
Flowchart for participant identification, inclusion, study design, interventions, assessments and follow-up
Fig. 2
Fig. 2
Standard Protocol Items: Recommendations for Interventional Trials (SPIRIT) figure (numbers beside t represent weeks)

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