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The problem
Intervention: Measurement of prenatal neonicotinoid exposure and longitudinal tracking of allergic disease trajectories
Who it was tested with: Approximately 8,900 mother-child pairs from the Japan Environment and Children's Study cohort.
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.
"Neonicotinoid concentrations were measured in maternal urine during early and mid-pregnancy. Disease trajectories (1-6 years) for AD and wheeze were identified using Latent Class Growth Analysis (LCGA)." This longitudinal cohort design with objective biomarker measurement and prospective disease tracking provides experimental-level evidence, though the inability to demonstrate causal links and limited generalisability to higher-exposure populations make the findings inconclusive.
Background neonicotinoid exposure levels in Japan were relatively low; findings may not apply to populations with higher exposure. Study design measures association but cannot determine causality.
Across countries and designs
2 studies · 2 countries
