Clinical Trial Details
— Status: Terminated
Administrative data
| NCT number |
NCT02557542 |
| Other study ID # |
14/LO/1295 |
| Secondary ID |
|
| Status |
Terminated |
| Phase |
N/A
|
| First received |
|
| Last updated |
|
| Start date |
October 2015 |
| Est. completion date |
March 2021 |
Study information
| Verified date |
April 2021 |
| Source |
Imperial College London |
| Contact |
n/a |
| Is FDA regulated |
No |
| Health authority |
|
| Study type |
Interventional
|
Clinical Trial Summary
A pilot randomised controlled trial looking at the setting up of a one stop vein clinic for
the treatment of varicose veins and assessing the quality-adjusted life years at 3 months of
patients This will be a pilot study which is designed to provide us with enough information
for a potentially larger multicentre randomised controlled study.
Description:
OBJECTIVES
- Primary Objective
o Measure the quality-adjusted life years (QALY) gained at 3 months (using EuroQoL's
EQ-5D) & AVVQ by patients randomised to treatment in the One Stop Vein Clinic with
patients randomised to treatment in the normal care pathway
- Secondary Objective
- Patient satisfaction with the service provided using the Picker patient experience
questionnaire both post-operatively and at the 3 months follow-up (One Stop Vein
Clinic versus Normal Care Pathway)
- Measure and compare the quality of life scores using CIVIQ at 0 and 3 months in
patients randomised to treatment in the One Stop Vein Clinic with patients
randomised to the Normal Care Pathway
- Record the time from referral to treatment (RTT)
- Assess the cost-effectiveness of the One Stop Vein clinic compared to the normal
care pathway
- Record the time to return to normal activities and to work
- Assess the estimated societal costs
BACKGROUND Varicose veins are very common conditions, affecting approximately 25% of the
population. Over 35,000 varicose vein procedures are currently carried out in the UK.
However, with the new 2013 NICE guidelines, the Department of Health has estimated that this
is set to increase to 50,000 per year. Waiting for varicose vein interventions has been shown
to be detrimental to the severity of the condition and the quality of life of patients.
Progression of varicose veins can also lead to complications such as leg ulcerations and can
be costly to the health service. Over the past decade, new endovenous techniques have been
introduced and these are felt to be cost-effective, especially, when performed in an
outpatient or 'office-based' setting. At present, patients referred to the Vascular unit for
consideration of management of their varicose veins have to attend the outpatient clinic at
least twice prior to be listed for their procedure.
At present, patients referred to the Vascular Outpatient Clinics for consideration for
varicose vein management have an initial appointment where the severity of the venous
insufficiency is assessed clinically and, subsequently, have a venous Duplex scan to evaluate
the extent and cause of any venous incompetence. If any treatable lesion is found, they are
then added to the waiting list to come for the eventual varicose vein procedure. This means,
they have to attend at least two outpatient appointments and attend another appointment for
their venous scans, before actually attending for their varicose vein procedure. Waiting for
varicose vein interventions has been shown to lead to worsening of their conditions both
clinically and radiologically. In addition, the quality of life of patients waiting for
elective surgery is adversely affected.
In order to evaluate patients' ideas and expectations with respect to the provision of
varicose vein service in the investigator's unit, they conducted a survey of patients
attending the Vascular Outpatient Clinic between March and June 2014. One hundred and six
patients completed the anonymous questionnaire. Most were females (62.4%) with a mean age of
51 ± 15 years. More than 90% of patients stated that the waiting time between a Vascular
appointment and a venous scan should be no more than 1 month and 85% of patients believed
varicose vein procedures should be received within 1 month of their Vascular clinic
appointment. Ninety percent of patients were agreeable to attend a 'one-stop' vein clinic
offering same day diagnosis and treatment. Patients were generally accepting of the fact that
most procedures would be carried out under local anaesthetic (89%).
Hence, it appears that patients in this unit have a preference for a one stop clinic. This
concept is not new and has been piloted in other specialities with good success - a one-stop
carpal tunnel clinic as well as a one stop cataract clinic was shown to be feasible with good
patient satisfaction. Both laparoscopic and open inguinal hernia repairs, where patients
received a general anaesthetic, have been carried out successfully using a one stop model
offering same day diagnosis and treatment. There is currently already a 'see and treat'
service for skin lumps operating at many NHS Trusts and there is already a one stop carpal
tunnel service being provided at the Imperial College NHS Trust. It would appear that these
one stop clinics have the advantage of reducing the number of unnecessary hospital visits as
well as possibly leading to cost savings to the health service.
As a result, the investigators intend to evaluate the one stop model within their own
varicose vein service. They will assess the feasibility of having a one-stop vein clinic,
where patients will be assessed, have their venous Duplex scans and, depending on the lesions
shown, have their venous treatment on the same day.
The hypothetical benefits of such a stratagem are an improvement in patient satisfaction, a
reduction in the number of appointments, the abolition of any waiting times as well as cost
savings to the health savings.
METHODS GP referrals will be screened and patients meeting the inclusion criteria will be
invited to take part in the trial .
They will be sent an information pack containing:
1. Information leaflet about the trial
2. Information about varicose veins, their treatments and a telephone number as a helpline
3. The Aberdeen Varicose Vein Questionnaire (AVVQ), the Chronic Venous Disease Quality of
Life Questionnaire (CIVIQ) and EuroQoL's quality of life questionnaire (EQ-5D)
4. Consent form to participate in the study
Patients agreeing to be part of the trial will be consented and randomised either to:
1. The One Stop Vein Clinic (offering same day diagnosis and treatment); or
2. The normal care pathway
Once patients indicate their consent to participate, their General Practitioners (GP) will be
sent a letter informing them of the patient's participation in this study.
Patients declining to partake in the randomised part of the study, but agreeable to complete
study questionnaires while continuing down the normal care pathway, will also be consented.
Further information will be provided to them when they attend for their clinic appointment
and the consenting process will take place when they attend for their subsequent procedure
One Stop Vein Clinic Pathway
Patients attending the One Stop Vein Clinic will be reviewed by the Vascular Surgeon, who
will confirm the patient's consent in the trial, then assess the degree of venous disease and
fill in the Clinical-Etiology-Anatomy-Pathophysiology (CEAP) classification and Varicose
Clinical Severity Score (VCSS). If the patient's symptoms are deemed secondary to venous
disease, they will be sent to have a Duplex scan to confirm the presence of the venous
disease. The results will be reviewed by the Vascular Surgeons, and if the patients are
suitable for endovenous ablation +/- avulsions or UGFS, they will be informed of the findings
of the scan and proposed treatment. If they are happy to go ahead with the proposed
intervention, they will be consented and transferred to the waiting area to wait for their
intervention. If, however, they decline same day treatment, they will be put onto the
conventional care pathway.
Another Vascular Surgeon will be carrying out the interventions in an 'office-based'
environment under local anaesthetic. Once done, the patients will be asked to fill the Picker
patient experience questionnaire. They will subsequently be discharged, similar to current
practice, and will be given a diary card to fill for when they return to their normal
activities and work.
Three (3) months post-operatively, they will be asked to fill the AVVQ, CIVIQ, EQ-5D and
Picker patient experience questionnaires once more. This will be done by sending them the
questionnaires by post.
The Normal Care Pathway (NCP)
In the normal care pathway, patients referred by their GP are seen in the outpatient clinic
and, if their symptoms are suggestive of varicose vein disease, they are sent to have a
venous duplex scan. This usually happens on a different day. Afterwards, they are seen back
in the clinic (again on a different day) and, if the scan result suggests venous incompetence
amenable to day case treatment, they are added to the waiting list. The eventual procedure
takes place some time later (within 18 weeks from referral to treatment). After their
procedure, they will be asked to fill a Picker patient experience questionnaire. On
discharge, they will be given a diary card to fill for when they return to their normal
activities and work.
At 3 months post intervention, patients randomised to the normal care pathway will be sent
the QoL questionnaires again and asked to fill the AVVQ, CIVIQ, EQ-5D and Picker patient
experience questionnaires. As there will be an inherent delay in the NCP pathway, the time
from randomisation cannot be used as many patients will not have received their
interventional treatment by then.
Inclusion and Exclusion Criteria
The inclusion criteria are:
1. Adults over the age of 18 years
2. Unilateral lower limb symptoms suggestive of venous disease on the referral letter
The exclusion criteria are:
1. Recurrent varicose veins
2. Known arterial disease or ABPI<0.8
3. Current deep vein thrombosis
4. Patients who withdraw their consent
5. Inability to complete the questionnaire or attend follow up appointments
6. Currently enrolled in other venous study
PATIENT SELECTION This is a pilot randomised controlled study and patients will be selected
following screening of the GP referral letter.
CONSENT As part of the consenting process, patients will be given three options.
1. Patients wishing to attend the One Stop Vein Clinic and participate in the study will be
asked to indicate their consent by signing a consent form and filling in a reply slip.
Patients will be randomised either to the One Stop Vein Clinic group or to the Normal
Care Pathway (NCP) group.
2. Patients not wishing to attend the One Stop Vein Clinic and participate in the study
will be asked to indicate this by filling in a reply slip. They will instead attend the
normal care pathway. They will, however, be asked, if agreeable to complete the QoL and
Picker patient experience forms.
3. Patients declining either the trial or simple service evaluation will be offered the
NCP.
TREATMENT ALLOCATION Treatment received will depend on the findings on the venous Duplex
scan. All treatments are minimally invasive with endovenous ablation procedures (either
radio-frequency ablation, endovenous laser ablation or mechano-chemical ablation), avulsions
or ultrasound-guided foam sclerotherapy. All procedures will be carried out under local
anaesthetic and patients will be discharged home later that day, as is the current standard
of care.
MEASUREMENT OF OUTCOMES
Primary Outcome
• Measure the quality-adjusted life years (QALY) gained at 3 months (by patients randomised
to treatment in the One Stop Vein Clinic with patients randomised to treatment in the Normal
Care Pathway)
Secondary Outcome
- Patient satisfaction with the service provided using the Picker patient experience
questionnaire both post-operatively and at the 3 months follow-up (One Stop Vein Clinic
versus Normal Care Pathway)
- Measure and compare the quality of life scores using EQ-5D, AVVQ and CIVIQ at 0 and 3
months in patients randomised to treatment in the One Stop Vein Clinic with patients
randomised to the Normal Care Pathway
- Time from referral to treatment
- Assess the cost-effectiveness of the One Stop Vein clinic compared to the normal care
pathway
- Record the time to return to normal activities and to work
- Assess the estimated societal costs
STUDY DURATION & SAMPLE SIZE Following screening of their GP referral letter, patients with
varicose vein disease will be invited to participate in the study. It is estimated that 12-14
patients will be invited on a weekly basis to participate in the study following screening.
Out of those, only 8 patients is expected to agree to be randomised to the One Stop Vein
Clinic or Normal Care Pathway. If the clinic is held weekly, approximately 416 patients could
be recruited over the course of the year (8 patients X 52 weeks).
Statistical analysis suggests that the sample size of 208 patients per group would be able to
power a potential phase 3 multicentre randomised controlled trial. Compared to a previous
study conducted in the investigators' unit which involved 317 patients in total and looked at
different quality of life scores and their responsiveness11, the coefficient of variation
(ratio of standard deviation to mean) was found to increase at the follow-up period and to
vary among the different scores used. With a larger sample size as in this pilot study, this
variability would be reduced and result in a smaller coefficient of variation when looking at
the follow-up scores. Hopefully, this will enable us to identify the QoL score with the least
variability and use it as the primary outcome measure in a future Phase 3 study. A primary
outcome measure with little variability would provide us with enough information to estimate
an adequate sample size for any future randomised controlled trials.
For example, with a sample size of 208 patients and coefficient of variation of 0.5, a 15%
reduction in the geometric mean (a measure of central tendency, similar to median) would be
required compared to 25% from the Shepherd et al. study. With power at 85%, this would allow
us to determine an adequate sample size.
Participants will be followed-up post-procedure for 3 months, including for patients
randomised to the Normal Care Pathway (with potentially longer waiting time from referral to
treatment). This means that the study period will be about 18 months. With 3 months for study
start-up and 3 months to write the study up, the study will last for 24 months. Approximately
1,000 patients undergo varicose vein procedures at the Imperial College NHS Trust every year.
COST BENEFIT OF PROJECT The hypothesis is that along with improved patient satisfaction and
improved waiting times for outpatient appointment, there will be cost savings derived from
the One Stop Vein Clinic. On average, 1,000 patients are treated every year in the Imperial
College NHS Trust and the cost of an outpatient attendance is approximately £93. Savings
could be made if patients are seen and treated at their first appointment rather than having
to attend another two appointments.
The potential cost saving is estimated to be in the order of £186,000 annually (£93 x 1,000 X
2).
Estimated societal costs. Data will be collected on time off from work and carer's duties
(child/relative/friend). Additionally, data on income, cost of attending clinic and impact on
family and colleagues will be assessed to estimate the societal cost of the two pathways.
