Working... Menu

Randomized Comparison of Low and Conventional Irradiance PDT for Skin Cancer

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02872909
Recruitment Status : Completed
First Posted : August 19, 2016
Results First Posted : January 4, 2019
Last Update Posted : January 4, 2019
Information provided by (Responsible Party):
Sally Ibbotson, University of Dundee

Brief Summary:
This study aims to examine whether the pain of topical photodynamic therapy (PDT) is significantly different when using low irradiance ambulatory light emitting diode (LED) devices compared with conventional higher irradiance hospital based LED light sources when used for superficial non-melanoma skin cancer. The investigators are also investigating the phototoxicity and efficacy of each regime in this randomized assessor-blinded clinical trial.

Condition or disease Intervention/treatment Phase
Non-melanoma Skin Cancer Device: Ambulight (Ambicare Health) Not Applicable

Detailed Description:
A randomized assessor-blinded comparative study of low irradiance ambulatory LED devices with conventional hospital-based LED devices for superficial non-melanoma skin cancer. Preliminary observations suggest that low irradiance LEDs cause less pain but are as effective, so the investigators are examining this in a clinical trial of patients with lesions </= 2cm diameter of non-melanoma skin cancer (Bowen's disease and superficial basal cell carcinoma). Patients with these conditions referred to the PDT clinic will be invited to participate and if they are eligible and consent to treatment then they will be prospectively randomized to either ambulatory PDT or conventional PDT. Pain and phototoxicity scores will be recorded and clinical efficacy will be assessed up to one year after the last treatment. Computer-generated block randomization will be performed and at 90% power to detect as significant at the 5% level a mean difference in pain score of 2 in one group compared with 4 in the other, 36 patients will be needed, and as the participants will often be elderly and frail the investigators will aim for a safety margin of recruiting 50 participants to account for drop-outs. Participants will receive two treatments of either arm at a one week interval and will be assessed clinically at three months and if residual disease remains then the two treatments a week apart are repeated. Pain assessed using a visual analogue scale (VAS) score and phototoxicity on a semi-quantitative scale are recorded at 7 days when the participant returns for their second treatment. Follow up for clinical assessment is at 6 months and one year after treatment. Participants also give their opinion of treatment at one year follow up. Assessors of adverse effects and efficacy will be blinded. Data recording and analysis will be undertaken by the study statistician Dr Robert Dawe and analysis will be on an intention to treat basis using appropriate statistical tests comparing the pre-planned outcome measures, with pain as primary outcome and outcome, efficacy and patient satisfaction as secondary outcomes

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 50 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Randomized Assessor-blinded Comparison of Low Irradiance and Conventional Irradiance Photodynamic Therapy (PDT) for Superficial Non-melanoma Skin Cancer
Study Start Date : October 2011
Actual Primary Completion Date : February 6, 2017
Actual Study Completion Date : February 6, 2017

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Skin Cancer

Arm Intervention/treatment
Active Comparator: low irradiance LED PDT
Ambulight LED portable PDT treatment
Device: Ambulight (Ambicare Health)
battery-operated low irradiance red light LED ("skin cancer plaster")

Active Comparator: conventional higher irradiance LED
Conventional LED hospital based standard PDT treatment
Device: Ambulight (Ambicare Health)
battery-operated low irradiance red light LED ("skin cancer plaster")

Primary Outcome Measures :
  1. Pain on VAS Score [ Time Frame: one week after treatment ]
    assess on visual analogue scale (VAS) score of 0 - 10cm, with 0 representing no pain experienced through to 10 representing the worst pain imaginable. The participant marks across a 0-10cm unmarked line where their level of pain experience is and this is measured eg. 2cm if experiencing mild pain or 8.5cm which would represent severe pain

Secondary Outcome Measures :
  1. Phototoxicity [ Time Frame: one week after treatment ]

    erythema, oedema, blistering, crusting, ulceration on semi-quantitative scale. Erythema is graded as 0 = absent, 1 = mild, 2 = moderate or 3 = severe erythema as assessed by naked eye examination. Oedema is graded as 0 = absent or 1 = present. Likewise crusting or ulceration are each graded as 0 = absent and 1 = present by naked eye examination. Data will be presented and analysed separately ie. erythema data will be presented and then separately whether oedema, crusting or ulceration are present or absent.

    ie. reporting may appear as example: erythema score 3 of range of 0-3 options; oedema score 1 (binary option of 0 or 1); crusting score 0 (binary option of 0 or 1); ulceration score 0 (binary option of 0 or 1)

  2. Clinical Clearance of Lesion [ Time Frame: 12 months after treatment ]
    clinical assessment by study dermatologist to determine by inspection and palpation whether the lesion is clear, partially clear or not clear - assessed at 3, 6 and 12 months after treatment, with 12 months as the final study outcome endpoint analysed

  3. Patient Satisfaction [ Time Frame: one year after treatment - last visit ]

    brief patient questionnaire to evaluate their opinion of the treatment they received. This is assessed as A.efficacy of treatment - 1 = not effective NR; 2 = partIally effective PR; 3 = completely effective CR; B.Side effects of treatment eg. pain and inflammation - 1 = severe; 2 = moderate; 3 = mild; 4 = none/minimal. C.Practicalities of treatment eg. ease of use, travel, time, inconvenience - 1 = very disruptive and difficult; 2 = moderately disruptive and difficult; 3 = minimally disruptive and difficult. The scores of A, B and C will be added to give an overall score with range of overall minimum score option 3 and maximum 10.

    Patients will also separately be asked to give overall evaluation on a VAS scale of 0 = treatment very poor and would not have again through to 10 = treatment excellent and I would have again - with a continuous line option from 0 - 10 to mark across, providing a separate score with range options 0 to 10

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Bowen's disease or superficial basal cell carcinoma referred for PDT and lesion not greater than 2.4cm diameter

Exclusion Criteria:

  • Unable to give consent, >2cm diameter, lesions on highly curved surfaces where ambulatory device would not adhere

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02872909

Sponsors and Collaborators
Sally Ibbotson
Layout table for investigator information
Principal Investigator: Sally H Ibbotson, MD University of Dundee
  Study Documents (Full-Text)

Documents provided by Sally Ibbotson, University of Dundee:

Layout table for additonal information
Responsible Party: Sally Ibbotson, Dr Sally H Ibbotson, University of Dundee Identifier: NCT02872909     History of Changes
Other Study ID Numbers: 2011DS04
First Posted: August 19, 2016    Key Record Dates
Results First Posted: January 4, 2019
Last Update Posted: January 4, 2019
Last Verified: December 2018
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes
Plan Description: peer reviewed publications and presentations at international and national meetings
Supporting Materials: Study Protocol
Statistical Analysis Plan (SAP)
Informed Consent Form (ICF)
Clinical Study Report (CSR)
Time Frame: presenting study data at British Association of Dermatologists annual meeting Edinburgh 5.7.18 and abstract will be published in Br J Dermatol and full publication will follow
Access Criteria: via presentation and publication in peer-reviewed journal

Additional relevant MeSH terms:
Layout table for MeSH terms
Skin Neoplasms
Neoplasms by Site
Skin Diseases