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Association between ambient temperature 2–8 weeks postconception and noncritical heart defects, Quebec, April through September, 1988–2012. Note: Prevalence ratio (bold central line) and 95% CI (light outer bands) for number of days with maximum temperature ≥ 30°C between weeks 2 and 8 postconception, relative to 0 days, adjusted for maternal age, comorbidity, parity, multiple birth, socioeconomic area deprivation, month and period of conception, and humidity.
