Clinical Trials Logo

Clinical Trial Summary

Single-center, case-control, longitudinal, observational, population based cohort study with stratified sample (by age group, gender, and residential area).


Clinical Trial Description

This study will involve schoolchildren (aged 6-18 years), population cohort based on differential exposure and susceptibility to allergy(paediatric population, allergic vs. healthy subjects). participants will be selected based on proven sensitization to at least one food allergen (preferentially but not only to seafood) with a diagnosis of at least one allergic disease (i.e. allergic asthma, allergic rhinitis (AR), atopic dermatitis (AD) and/or food allergy) for at least a year. Subjects will be recruited from three distinct and different geographical regions in Croatia: 2 continental regions (Zagreb, urban) and Slavonia (urban and rural) and 1 Mediterranean region (urban and rural population), differing in the levels of exposure (allergens, pollutants), consumption of water (main water source- bottled water, public water source, well water), food consumption (food packed in plastic material, use of fertilizers in agriculture), nutrition (food from marine environments, industrially processed food, homegrown food) as well as different environmental protection measures and human activities.In each region and subgroup, we will recruit 70 allergic children and 140 healthy (non-allergic) children in a case-control study protocol, summing up to al total of 630 participants. The study will include visits: 1. Initial (screening) visit (V0 +3-6 months): written consent, assessment of inclusion and exclusion criteria, spirometry, Fractional exhaled nitric oxide (FeNO), questionnaires… 2. V2 (V0+6-9 months), questionnaires, environmental skin prick test (APT), sIgE (+ISAC), spirometry, FeNO, blood collection stool, 3. V2-V5 (V0+months 6-30 months)- regular visits (assessment) every 6 months, stool samples (second sampling) 4. Visit 4 (V0+18-24 months): environmental assessments, skin prick test (APT), sIgE (+ISAC), spirometry, FeNO, blood collection 5. V5 (last visit, V0+24-30 months)- final assessment of the study outcome measures, check and document consumption, adherence, preventive measures, level of control, therapy correction Participants in the control group will be involved in collaboration with other outpatient clinics (eg. from surgical outpatient clinics who have had minor surgical procedures, from the Otorhinolaryngology- Ear, Nose, Throat (ENT) outpatient clinics at least 7 days after acute ear inflammation or laryngitis, from emergency ambulatory patients at least 7 days after acute respiratory illness, etc.). All participants who will be included in the control group should have a negative history of allergic diseases, as well as other severe chronic diseases, including malignant, autoimmune, or mental illnesses. They will need to fulfil the ISAAC questionnaire for children perform spirometry and prick test with a standard palette of inhalational and nutritional allergens to exclude allergic diseases. No intervention tests or methods will be involved in this study. Patients who will be involved in the study will continue to take their regular therapy (according to guidelines) i.e. conduct treatment and all other non-therapeutic measures as if they were not involved in the study. Any deterioration or emergency intervention will be specifically evaluated and recorded as additional visits. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT05177744
Study type Observational [Patient Registry]
Source Children's Hospital Srebrnjak
Contact
Status Recruiting
Phase
Start date October 5, 2022
Completion date February 28, 2025

See also
  Status Clinical Trial Phase
Completed NCT04450108 - Vivatmo Pro™ for Fractional Exhaled Nitric Oxide (FeNO) Monitoring in U.S. Asthmatic Patients N/A
Recruiting NCT05734261 - Forced Oscillations Technique During a Metacholine Test in Children N/A
Recruiting NCT06044051 - Dynamics of the Upper and Lower Airway Respiratory Microbiomes Associated With Severe Infant Asthma N/A
Completed NCT04896502 - Effectiveness of Telemedicine Home Assessments for Identification and Reduction of Asthma Triggers N/A
Completed NCT03503812 - Mitigating the Health Effects of Desert Dust Storms Using Exposure-Reduction Approaches N/A
Recruiting NCT06003569 - Reducing Asthma Attacks in Disadvantaged School Children With Asthma N/A
Not yet recruiting NCT05902702 - Isotonic Saline for Children With Bronchiolitis N/A
Not yet recruiting NCT05547477 - Continuous EMG Measurements in Children With Asthma During Sleep
Completed NCT04388098 - Oral Health Status of Asthmatic Children
Terminated NCT03586544 - Reducing Exercise-induced Bronchoconstriction in Children With Asthma and Obesity Phase 4
Recruiting NCT04821908 - Consequences of COVID 19 Pandemic on Childhood Asthma
Not yet recruiting NCT03277170 - Pragmatic RCT of High-dose Oral Montelukast for Moderate and Severe Pediatric Acute Asthma Exacerbations Phase 2
Enrolling by invitation NCT06239844 - Navigating Together for Equitable Asthma Management for Children in Families Who Communicate in Language Other Than English N/A
Not yet recruiting NCT05974917 - Serious gaMes as Emerging E-health Interventions for Young People With neurologicaL or rEspiratory disoRders
Not yet recruiting NCT05997784 - Study of Indoor Air Pollutants and Their Impact in Childhood Health and Wellbeing
Recruiting NCT05366309 - Performance and Adherence in Children Using Spacers N/A
Completed NCT05684926 - COVID-19 Pandemic Asthma Child Telerehabilitation Yoga N/A
Recruiting NCT04166344 - A mHealth Intervention to Improve Symptom Control in Children and Adolescents With Difficult-to-control Asthma N/A
Completed NCT03673618 - Soluble Corn Fiber Supplementation for Asthma Phase 2
Completed NCT05576142 - Oral Findings in Pediatric Patients With Allergic Rhinitis and/or Asthma