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The problem
Intervention: Natural experiment: exposure to SARS pandemic in 2003
Who it was tested with: 14,647 children in China with longitudinal developmental measurements.
Children or communities are compared with a group that did not receive the intervention, or followed over years. This is the design that best separates what the intervention did from everything else that changed.
"A retrospective study was conducted to associate the SARS pandemic in 2003 with development milestones or physical examinations among longitudinal measurements of 14,647 children." The study used longitudinal data to compare developmental outcomes between exposed and unexposed children, establishing temporal sequence and allowing quantification of association through hazard ratios.
Retrospective design; does not establish causality; unclear whether delays were temporary or persistent; does not identify specific mechanisms of impact or mediating factors.
Across countries and designs
1 study · 1 country
