Fig. 4From: Acute associations between heatwaves and preterm and early-term birth in 50 US metropolitan areas: a matched case-control studyOdds ratio estimates for heatwave indicators on early-term birth by maternal race/ethnicity: Hispanic (blue square), non-Hispanic white (solid yellow circle), and non-Hispanic black (green diamond) using mean temperature over 97.5th percentile to quantify heatwave. P-values were obtained from the joint test for interactionBack to article page