CClinicalTrials.gg
Status unknownNCT05534555PREFIXUpdated Sep 9, 2022

Point of Care Testing Using FebriDx in Primary Care: a Mixed Methods Feasibility Study

An interventional study of FebriDx in Lower Resp Tract Infection, sponsored by University of Southampton. Status unknown. Open to participants aged 1 Year and older. Per ClinicalTrials.gov, last updated 2022-09-09.

Sponsored by University of Southampton · Not applicable, Interventional, and Diagnostic

The sponsor has not verified this record recently (last verified Sep 2022), so the status shown — last known as Not yet recruiting — may be out of date.
Phase
Not applicable
Study type
Interventional
Enrollment
300
Allocation
Not applicable
Ages
1 Year and older
Sex
All
01

Study summary

This is a mixed-methods, multi-centre feasibility study. Formal advice and peer-review with regards to study design was sought from the Southampton Research Design Service (RDS), the NIHR CRN Wessex, and patient contributors during the development of the grant application. We will recruit up to ten GP practices, each given 20-40 FebriDx tests (300 in total). Up to four clinicians per practice will be trained to use the test. A sequential explanatory approach to data collection will be taken (21), with quantitative data analysis in stage one, followed by qualitative interviews with the study's practice participants in stage two.

Read the detailed description

It can be difficult to tell the difference between viral and bacterial infections. Many patients are therefore prescribed antibiotics unnecessarily. Overuse of antibiotics is leading to a crisis of 'antibiotic resistance', where antibiotics no longer work for some infections.

FebriDx ® is a new hand-held test that uses a 'finger-prick' of blood, and within 10 minutes, provides a result that can help clinicians decide whether an infection is likely to be caused by a virus or bacteria. This could help clinicians decide when antibiotics are needed, but the test has not been adequately tested in primary care.

We would like to do a future study to test whether FebriDx can safely reduce antibiotic prescriptions in primary care.

However, before we do this, we need to do a smaller 'feasibility' study to explore how easy to use the FebriDx test is and, what GPs and patients think of the test, and to help us design a larger future study.

Aims

  1. Explore whether FebriDx could reduce the use of antibiotics for chest infections in primary care.
  2. Explore how feasible it would be to do a large research study in the future using FebriDx

Methods

We will recruit up to ten GP practices, each given 20-40 FebriDx tests (300 total).

Stage one Patients with a chest infection will be invited to participate if their clinician has decided that they are likely to prescribe antibiotics. Following consent, the clinician will record some basic information about the patient, and the patient will undergo the FebriDx test. The clinician will then record whether or not they prescribed antibiotics and if they think the test had an effect on their decision. Patients will also undergo an optional nasopharyngeal swab.

Stage two Clinicians and patients will be interviewed on how useful they think FebriDx testing is, and how they think we should design a larger future study.

02

Conditions studied

  • Lower Resp Tract Infection

Browse trials for

03

In context

Infections

6,687 studies on the registry are indexed under Infections; 807 are open to participants now.

This study's planned enrollment of 300 is above the median of 120 across 4,200 interventional studies indexed under Infections.

Browse Infections studies →

Lead sponsor

University of Southampton is the lead sponsor of 121 studies on the registry; 19 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
1 Year and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Lower respiratory tract infection (defined as in previous studies as an acute cough as the predominant symptom, judged by the GP to be infective in origin, lasting \<21 days, and with other symptoms or signs localising to the lower respiratory tract (shortness of breath, sputum, chest pain). This is a definition which we have used in previous studies (22)
  • The clinician has decided that they are likely to prescribe antibiotics in the absence of further diagnostic testing
  • The patient is at the surgery or willing to attend the surgery for a face-to-face assessment
  • The patient (or their parent or legal guardian) can follow the study procedures and is willing to provide informed consent

Exclusion criteria

Exclusion Criteria:

  • Patients who have taken antibiotics within the last 30 days
  • Participant (or their parent/guardian) unable to provide informed consent
05

Study design

Phase
Not applicable
Primary purpose
Diagnostic
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
300 participants (estimated)

Study arms

  • Other
    Febridx

    Undergo FebriDx testing

    Diagnostic Test: FebriDx

Interventions

  • Diagnostic testFebriDx

    Testing of finger-prick blood sample using FebriDx

06

What researchers measure

Primary outcomes

  1. Recruitment rate

    The proportion of patients recruited as compared to the number invited to participate

    Time frame: Six months

  2. Antibiotic prescription rate at study visit

    The proportion of patients prescribed antibiotics at the study visit

    Time frame: At study visit (baseline)

  3. Antibiotic prescription rate over entire study period

    The proportion of patients prescribed antibiotics within 30 days of recruitment

    Time frame: Within 30 days of recruitment

  4. Test failure rate

    The proportion of Febridx tests which fail to provide a valid result

    Time frame: After FebriDx use (baseline)

  5. Ease-of-use scores

    The average ease-of-use score for the device as determined by users. Each user will be asked to grade the device according to a modified US Clinical Laboratory Improvement Amendments (CLIA) categorisation criteria Within each of the 11 categories, a score of '1' indicates the lowest level of complexity, and the score of '3' indicates the highest level, to derive a measure of complexity (total score range 1 - 33)

    Time frame: Six months

  6. Subsequent healthcare contacts

    The proportion of patients undergoing subsequent healthcare contact

    Time frame: Within 30 days of recruitment

  7. Subsequent serious complication rate

    The proportion of patients undergoing significant complications (sepsis, ITU admission, or death)

    Time frame: Within 30 days of recruitment

Secondary outcomes

  1. FebriDx sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) for diagnosis of viral infection

    FebriDx sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) for diagnosis of viral infection, as determined by comparison of FebriDx result with nasopharyngeal swab analysis by gold-standard viral PCR

    Time frame: Within one year

07

Study locations

No study locations are listed for this record.

08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 9, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05534555
Lead sponsor
University of Southampton
Responsible party
Sponsor
First posted
Sep 9, 2022
Start date
Oct 2022 (estimated)
Primary completion
Oct 2023 (estimated)
Completion
Oct 2024 (estimated)
Last update
Sep 9, 2022

Study contacts

Christopher Wilcox
Contact
christopher.wilcox@soton.ac.uk
02380591759
Nick Francis
Contact
Nick.francis@soton.ac.uk
Christopher Wilcox
principal investigator · University of Southampton

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Sep 2022. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion