The National Longitudinal Survey of Children and Youth (NLSCY) was a longitudinal, prospective cohort study conducted by Statistics Canada to track the health, development, and social well‑being of Canadian children and their families over time.
Scope and Design
- Population: The survey began with a nationally representative sample of 19,375 children aged 0–11 years, drawn from households across Canada’s provinces and territories.
- Frequency: Data collection occurred in cycles roughly every two years, producing six waves of data from 1994/95 through 2008/09.
- Methodology: Each cycle combined in‑person household interviews, self‑administered questionnaires, and, for younger children, proxy reports from parents or caregivers. Core modules covered physical and mental health, education, family structure, income, neighbourhood conditions, and child development indicators.
Objectives
- Monitor Trends: Provide longitudinal data on the health, education, and social outcomes of Canadian children, enabling analysis of changes across cohorts and over developmental stages.
- Inform Policy: Supply evidence for federal, provincial, and territorial policymakers on issues such as child poverty, health disparities, early childhood education, and family dynamics.
- Support Research: Offer a publicly accessible data resource for academic, governmental, and non‑profit researchers studying child development and youth transitions.
Key Findings (selected)
- Socio‑economic Gradient: Persistent associations were identified between family income and child health outcomes, including higher rates of obesity and chronic conditions among lower‑income households.
- Psychological Well‑being: Longitudinal data highlighted increasing prevalence of anxiety and depressive symptoms during early adolescence, particularly among females.
- Education Transitions: Evidence indicated that early exposure to high‑quality early childhood programs correlated with improved high‑school graduation rates.
- Family Structure: Children living in single‑parent or blended families exhibited distinct patterns of material deprivation and social support compared with those in two‑parent households.
Data Access and Legacy
- The NLSCY public‑use microdata files are housed in the University of Toronto’s Centre for Data Science, accessible through Statistics Canada’s “Research Data Centres” (RDC) under a formal data‑use agreement.
- After the final wave in 2008/09, the study was succeeded by the Canadian Longitudinal Survey on Immigration, Integration and Mobility (CLIMUM) and other thematic panels, while the NLSCY dataset continues to be cited in scholarly literature and policy reports.
Criticisms and Limitations
- Attrition: As with most longitudinal studies, participant dropout over successive cycles introduced potential bias, especially among highly mobile or low‑income families.
- Measurement Intervals: The biennial data collection schedule sometimes missed rapid developmental changes occurring between waves.
- Cultural Sensitivity: Initial survey instruments had limited tailoring for Indigenous and immigrant populations, prompting later amendments and supplementary modules.
References
- Statistics Canada. National Longitudinal Survey of Children and Youth (NLSCY) – Methodology Overview. (1994‑2009).
- Colman, I., & Kuehner, C. (2008). Trends in Child Health and Development: Findings from the National Longitudinal Survey of Children and Youth. Canadian Journal of Public Health, 99(3), 200‑207.
- Moffatt, R. et al. (2013). Socio‑economic Status and Child Outcomes: Evidence from the NLSCY. Social Indicators Research, 111(2), 435‑452.
The National Longitudinal Survey of Children and Youth remains a foundational resource for understanding the long‑term trajectories of Canadian youth and for shaping evidence‑based child and family policies.
