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CompletedNCT04821908VIRASTHCOVIDUpdated May 14, 2026

Consequences of COVID 19 Pandemic on Childhood Asthma

An observational study in Asthma in Children, sponsored by University Hospital, Lille. Completed at 1 site in France. Open to participants aged 3 Years to 16 Years. Per ClinicalTrials.gov, last updated 2026-05-14.

Sponsored by University Hospital, Lille · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
577
Ages
3 Years to 16 Years
Sex
All
01

Study summary

The SARS-CoV2 pandemic, which emerged in the first quarter of 2020, has led to an unprecedented health crisis in our modern healthcare systems and has resulted in strong national public health measures. The impact of the pandemic and its indirect environmental consequences on pediatric asthma is currently being assessed. In particular, the study of its role on the risk of exacerbations and modification of control is one of the priority research objectives defined by European societies.

The primary aim is to study the impact of the pandemic on asthma control in children aged 3-16 years with a medical diagnosis of asthma, compared to data from other observational cohorts conducted in the same region prior to the pandemic.

A sub-population of children 3-16 years will be assessed at exacerbation and at a follow-up visit, 2-4 months later, with clinical data, biological and microbiological samples.

Read the detailed description

Children aged 3-16 years with a medical diagnosis of asthma, will be assessed for asthma control, exacerbation rate.

Data will be compared to data from other observational cohorts conducted in the same region prior to the pandemic.

A sub-population of children 3-16 years will be assessed at exacerbation and at a follow-up visit, 2-4 months later, with clinical data, biological and microbiological samples.

02

Conditions studied

  • Asthma in Children

Keywords

  • Asthma control
  • COVID-19 pandemic
  • Respiratory infection
  • Environmental pollution
03

In context

COVID-19

7,640 studies on the registry are indexed under COVID-19; 488 are open to participants now.

This study's enrollment of 577 is above the median of 260 across 3,135 observational studies indexed under COVID-19.

Browse COVID-19 studies →

Lead sponsor

University Hospital, Lille is the lead sponsor of 625 studies on the registry; 141 are open to participants now.

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

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Who can participate

Ages eligible
3 Years to 16 Years
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Probability sample

Study population

children and adolescents diagnosed with asthma.

Inclusion criteria

  • Children and adolescents aged 3 to 16 years old
  • With a medical diagnosis of asthma as per-guidelines, who had been followed-up for at least 6 months,
  • Assessed in one of the pediatric departments participating in the study,
  • After written consent of at least one of the 2 parents and/or representative of the parental authority, and of the child if he is older than 8 years old.

Criteria for the sub-population assessed at "exacerbation" and second visit:

  • Children and adolescents aged 3 to 16 years
  • With a medical diagnosis of asthma as per-guidelines, who had been followed-up for at least 6 months,
  • Hospitalized for a severe asthma exacerbation (requiring hospitalization and general corticosteroid therapy) at Lille University Hospital
  • After written consent of both parents and/or representative of the parental authority, and of the child if he is over 8 years old

Exclusion criteria

Exclusion Criteria:

  • History of chronic respiratory disease other than asthma,
  • Inability of parents to receive informed information, inability to participate in the entire study, refusal to sign the consent form
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Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
577 participants (actual)
Patient registry
No
Biospecimen retention
Samples with dna

Groups and cohorts

  • Group 1

    population included in the VIRASTHMA COVID G4 study

  • Group 2

    population included in the previous studies "VIRASTHMA", "CHAMPIASTHMA" (IRDCB No.: 2019-A03310-57), "COBRAPED" (NCT02114034), "VIRASTHMA 2" (IRDCB No.: 2014 A01687 40, NCT: 03960359), "INCOVPED" (pediatric emergencies, NCT04336761).

06

What researchers measure

Primary outcomes

  1. Controlled asthma

    Composite criteria defined by a cACT (4-11 years) or ACT (12-16 years) score ≥ 20 and according to GINA criteria.

    Time frame: at inclusion

Secondary outcomes

  1. Characteristics of asthma

    Composite criteria : allergic phenotype, severity assessed by GINA treatment level, number of exacerbations in the past year, lung function

    Time frame: At inclusion and follow-up visit at 2-4 months for the sub-population included at exacerbation

  2. history of SARS-Cov2 infection in the past year

    history of SARS-Cov2 infection based on patient report

    Time frame: At inclusion and Follow-up visit at 2-4 months for the sub-population included at exacerbation

  3. number of infectious episodes in the past year

    number of infectious episodes based on patient report

    Time frame: At inclusion and Follow-up visit at 2-4 months for the sub-population included at exacerbation

  4. Observance

    Assessed by four-items Morisky-Green questionnaire : 1/ Do you ever forget to take your medication; 2/ Are you careless sometimes about taking your medication 3/ When you feel better, do you sometimes stop taking your medication 4/ Sometimes, if you feel worse when you take your medication, do you stop taking it. An answer "no" to any of the 4 questions is considered as "not well-observed medication".

    Time frame: At Inclusion and Follow-up visit at 2-4 months for the sub-population included at exacerbation

  5. QoL (Quality of life) in children aged 7-17 years

    Assessed by PAQLQ : PAEDIATRIC ASTHMA QUALITY OF LIFE QUESTIONNAIRE. The PAQLQ has 23 questions in 3 domains (symptoms, activity limitation and emotional function). The activity domain contains 3 'patient-specific' questions. Children are asked to think about how they have been during the previous week and to respond to each of the 32 questions on a 7-point scale (7 = not bothered at all - 1 = extremely bothered). The overall PAQLQ score is the mean of all 23 responses and the individual domain scores are the means of the items in those domains. The highest the score is, the better QoL is.

    Time frame: At Inclusion and Follow-up visit at 2-4 months for the sub-population included at exacerbation

  6. Outdoor levels of pollutants and pollens

    Composite criteria : monthly average measurements of CO, O3, NO, NO2, SO2, PM2.5, PM10 and pollen counts

    Time frame: At Inclusion and Follow-up visit at 2-4 months for the sub-population included at exacerbation

  7. Respiratory virus infection (SARS-CoV2 and other)

    Results of viral PCR

    Time frame: at exacerbation and at follow-up visit at 2-4 months for the sub-population included at exacerbation

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Study locations

1 site
  • CHU Lille
    Lille, France
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 14, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT04821908
Lead sponsor
University Hospital, Lille
Responsible party
Sponsor
First posted
Mar 30, 2021
Start date
Sep 14, 2021
Primary completion
Mar 31, 2025
Completion
Mar 31, 2025
Last update
May 14, 2026

Study contacts

Stéphanie Lejeune, MD
principal investigator · University Hospital, Lille

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 completed, as verified in Mar 2025. You cannot join it, but the record below documents what was studied.

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