PRospective Observational Multicentre Study on VAriability of Lung Function in Stable PCD Patients (PROVALF-PCD)
Studie Overzicht
Toestand
Toestand
Conditie
Conditie
Interventie / Behandeling
Interventie / Behandeling
Gedetailleerde beschrijving
Background
Lung function measurements are commonly used in PCD to monitor disease progression. Spirometry measurements are taken every 3 months and results are compared to established references, adjusted for age, height and ethnicity. Results are also compared to previous measurements from the same patient at earlier appointments. However, little is understood of the impact of intra-individual variability and the extent of spontaneous variations in these comparisons.
One of the priorities for respiratory research in the UK is to understand factors involved in determining different outcomes for lung function.[1] The precision of measurements done on the same individual conducted by different people, in different settings and using different equipment is not entirely known. Importantly, previous studies in healthy children assessing intra-individual variability have shown variations of up to 1.2 z-scores in spirometry parameters over the course of 1 year.[2] Within test-variability and daily repeatability can range from 2 to10% FEV% predicted in young healthy children.[3],[4]
In PCD, deterioration of lung function does not follow a pre-defined pattern.[5] However, none of the published studies on lung function in PCD to date have taken into consideration the imprecision of individual and repeated measurements on the same individual over time. Personal experience and unpublished small retrospective assessments suggest that there is considerable variability.
Key research question
Quantify intra-individual (i.e. in the same individual) variations between measurements of lung function in stable patients with primary ciliary dyskinesia (PCD), a rare genetic disease that causes lung damage.
Study design
Prospective multicentre cohort study using routinely collected clinical data to evaluate natural variability of lung function measurements in stable PCD patients.
The primary end-point is to assess intra-individual variations between repeated measures of lung function parameters. Secondary end-points include: a) Inter-individual variations between repeated measures of lung function parameters and correlations with baseline measures; b) intra- and inter-individual variation between repeated measures of lung function parameters during exacerbation.
Participants will be approached by their clinicians and asked to sign a consent form to allow for their anonymised routinely collected clinical data to be entered into the study. Routine clinical data will be collected at PCD follow-up clinics in participating centres. These data are already collected for clinical purposes and will be anonymised locally. Non-identifiable data will be entered into the study database by a member of the clinical team of the participating centre. The study coordinating centre (University of Southampton) will only have access to the anonymised dataset.
The data collection period will last 18 months (6 months for patients recruitment and 12 months for patient follow-up).
Studietype
Studietype
Inschrijving (Werkelijk)
Inschrijving
Contacten en locaties
Studie Locaties
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-
Hampshire
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Southampton, Hampshire, Verenigd Koninkrijk, SO16 6YD
- University of Southampton
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Deelname Criteria
Geschiktheidscriteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
- Kind
- Volwassen
- Oudere volwassene
Accepteert gezonde vrijwilligers
Bemonsteringsmethode
Studie Bevolking
Beschrijving
Inclusion Criteria:
- Children (>5 years of age) and adults being follow-up for PCD
- Availability of at least minimal dataset (spirometry data), at least every 6 months
- Outpatients and/or in-patients
Exclusion Criteria:
- Children < 5 years of age
- Regular interval between spirometry testing > 6 months
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
Wat meet het onderzoek?
Primaire uitkomstmaten
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Intra-individual variability of FEV1 z-scores
Tijdsspanne: up to one-year follow-up period
|
Natural intra-individual variability of FEV1 z-score in patients that are not experiencing an episode of chest exacerbation at the time of lung function measurement.
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up to one-year follow-up period
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Secundaire uitkomstmaten
Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
|
Inter-individual variability of FEV1 z-scores
Tijdsspanne: up to one-year follow-up period
|
Inter-individual variations between repeated measures of lung function parameters.
|
up to one-year follow-up period
|
Medewerkers en onderzoekers
Sponsor
Sponsor
Medewerkers
Medewerkers
Studie record data
Bestudeer belangrijke data
Studie start (Werkelijk)
Studie start
Primaire voltooiing (Verwacht)
Primaire voltooiing
Studie voltooiing (Verwacht)
Studie voltooiing
Studieregistratiedata
Eerst ingediend
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Werkelijk)
Eerst geplaatst
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update geplaatst
Laatste update ingediend die voldeed aan QC-criteria
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
Andere studie-ID-nummers
- PROVALF
Plan Individuele Deelnemersgegevens (IPD)
Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?
Beschrijving IPD-plan
IPD-tijdsbestek voor delen
IPD delen Ondersteunend informatietype
- LEERPROTOCOOL
- SAP
- ANALYTIC_CODE
Informatie over medicijnen en apparaten, studiedocumenten
Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel
Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct
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