Proof of Concept Study for a Dressing Glove

Principal research question/objective How effective is the disposable dressing glove when compared with the normal dressings and bandages used by the participants with RDEB based on 12 validated patient outcomes indicators that measure observations of hand function, device use, symptoms, and problems and limitations?

Secondary research questions Is the disposable dressing glove compatible with the SkinniesTM Web Spacer glove or any other make of glove used by the participants with RDEB to maintain their web spaces? Would you like to continue wearing the dressing glove? Is there anything else you(the participants) would like to tell us about the dressing glove?

Study design and methodology Study Design The proof of concept study of the dressing glove will be conducted using a quasi-experimental, n-of-1 research design drawn from the Medical Research Council Guidance for the design of complex interventions (MRC 2008). The reason for using this research design is due to a small sample of a small population of people with Recessive Dystrophic Epidermolysis Bullosa (RDEB). In addition, hand deformities amongst people with RDEB vary from one individual to another. Treatment and care also involve more than one intervention administered concurrently, for example wounds dressings, web-spacer gloves and splints. The researchers need to study the performance of these devices individually and together in terms of their effectiveness in delaying disease progression deformities.

The n-of-1 study design will enable investigation of the dressing glove performance against pre-determined performance criteria (12 patient recorded outcome measures on the HTO system) at the individual and group level with each participant acting as their own control.

Sample Size The sample for the GLOVE project is 14 participants. To date, seven adults and six children from pre-school age to school age have been recruited to the project from the project's two NHS sites, Guy's and St Thomas' (GSTT) NHS Foundation Trust and Great Ormond Street Hospital (GOSH) NHS Foundation Trust respectively. All the GLOVE participants will be invited to participate in the proof of concept study, subject to meeting the inclusion criteria.

Method of Recruitment The EB clinical team (GSTT; GOSH) will identify potential participants who meet the inclusion criteria for the study. The KCL research team will send a letter of invitation to these participants containing age appropriate information sheets, assent and consent forms (Letter of invitation V2 10 Jan 2017). The letter also has the contact details for the King's College Research team should the participants require further information. Participants will have a minimum of a week to decide if they would like to participate in the study. They will be invited to return the reply slip to the EB clinicians who will return them to the Chief Investigator. The EB clinicians will recruit and consent those participants who have not be involved in the GLOVE project to date. Those who have will be recruited and consented by the KCL research team. Adults (18 years and over) or their carers will be asked to provide written informed consent. Children (7-17 years) will also be asked to provide written informed consent. Their parents will also be asked to provide their written consent for their child to participate. Children aged 4-6 will be invited to provide written assent, once their parents have agreed to this. The parents will also provide their written consent, as will the parents of babies and toddlers. The consent and assent forms will be returned to the Chief Investigator at King's College London and kept in a locked cupboard, separated from the data in order to maintain data anonymity.

Conduct of the Proof of Concept Study The study will take place over 14 weeks. Participants will be asked to follow their usual dressing regime for six weeks. At week 7, they will be given several pairs of dressing gloves to familiarise themselves with. At week 8, participants will replace their usual dressings and bandages with the dressing glove or start to wear the gloves if they avoid dressings normally. If participants usually wear their gloves to maintain their web spaces, they will continue to wear these on top of the dressing glove to help assess compatibility.

Method of data collection Participants will provide feedback twice a week on the dressing glove by answering 12 questions (TELER indicators) using the Hand Therapy Online system (HTO), which is an electronic patient record system (HTO indicators V2 10 Jan 2017; Patient Guide V3). The indicators and the HTO were validated in the Pilot study (REC no: 16/LO/1046).

There are three types of measurements 1) TELER indicators, (2) physical measurements (3) measures of cost. The TELER indicators are a tool to measure observations of hand function, device use, symptoms and problems/limitations. The indicators measure clinically meaningful changes comprising an improvement, deterioration or no change in hand function from one time point to another. Each indicator is on a scale of six clinical steps or 'codes'. Code 5 is best case scenario or the treatment goal and code 0 is worst case scenario (i.e. the problem to be avoided) with codes 4, 3, 2 and 1 being clinically meaningful steps towards or away from the treatment goal.

GLOVE participants recruited to the study will be trained by the KCL researchers to use HTO system to provide feedback twice a week on the dressing glove by answering the TELER indicators for the dressing glove validated in the pilot study (REC no: 16/LO/1046).

The data from the HTO system will inform the methodology for measuring the cost effectiveness of the dressing glove.

Data analysis Numerical data analysis comprises automated calculation of patient specific index numbers within the digitised system (Deficit Index, Improvement Index, Maintenance Index, and Effectiveness Index) and two group indices (Health Status Index and Health Gain Index). An analysis of the costs of standard care versus the intervention will also be performed taking into account the use of products, time taken for wound care, and impact of wound care on daily living.

Researcher bias will be minimised by their minimal direct contact with the data collection process. In addition no attempt has been made to design out any confounding variables, thereby replicating the situations in which patients are normally treated.

Report writing and dissemination The Chief Investigator will take responsibility for writing the reports during the study and disseminating the findings, positive and negative, through publications and conference presentations.

The findings from the study will enable generalisations to be made to the wider population of RDEB patients with similar disease progression hand deformities that require the constant use of wound dressing and web-spacer gloves (Research Protocol V2 10 Jan 2017.