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Cumulative odd ratio estimated for daily stroke cases (95% confidence interval) associated with extreme heat exposure during the night [97.5th percentile of hot night excess (HNE) distribution] predicted for 2006–12 and 2013–20 stratified by three different subgroups. Asterisks and coloured groups indicate statistical significance for differences in odd ratio estimates between 2006–12 and 2013–20 (P < .05)
