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Updated: Jul 15, 2026

Establishment of a Clinic-based Biorepository
Published on: May 29, 2017
The Canadian healthy infant longitudinal development birth cohort study: biological samples and biobanking
T J Moraes1, D L Lefebvre, R Chooniedass
1Physiology and Experimental Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada; Department of Paediatrics, University of Toronto, Toronto, ON, Canada.
Insights
The Canadian Healthy Infant Longitudinal Development (CHILD) study investigates genetic and environmental factors in childhood allergy and asthma. This birth cohort study collects extensive data to understand these complex interactions and inform future health research.
Area of Science:
- Pediatric Health Research
- Environmental Epidemiology
- Genetic Epidemiology
Background:
- Childhood allergy and asthma are complex conditions.
- Genetic and environmental factors are hypothesized to interact in their development.
Purpose of the Study:
- To explore the interplay of genetic and environmental factors in childhood allergy and asthma.
- To establish a comprehensive birth cohort for longitudinal health research.
Main Methods:
- Longitudinal, general population birth cohort study.
- Recruitment from mid-pregnancy to 5 years of age.
- Collection of biological samples, questionnaires, clinical measures, and environmental data.
Main Results:
- Recruited 3624 families.
- Collected and archived thousands of biological samples and questionnaires.
- Established protocols for sample and data collection, storage, and release.
Conclusions:
- The CHILD study repository is a valuable resource for current and future research.
- Findings will inform studies on asthma, allergy, and other infant/child health aspects.
- Provides a wealth of data for understanding pediatric health determinants.
Background:
It is hypothesised that complex interactions between genetic and environmental factors give rise to allergy and asthma in childhood. The Canadian Healthy Infant Longitudinal Development (CHILD) study was designed to explore these factors.
Methods:
CHILD is a longitudinal, general population birth cohort study following infants from mid-pregnancy to age 5 years. Over this time period, biological samples, questionnaires, clinical measures and environmental data are collected.
Results:
A total of 3624 families have been recruited, and many thousands of samples and questionnaires have been collected, annotated, and archived. This report outlines the rationale and methodology for collecting and storing diverse biological samples from parents and children in this study, and the mechanisms for their release for analyses.
Conclusions:
The CHILD sample and data repository is a tremendous current and future resource and will provide a wealth of information not only informing studies of asthma and allergy, but also potentially in many other aspects of health relevant for Canadian infants and children.
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