Extended Data Fig. 5: Effects of heat exposure on preterm birth at a long lag.
Meta-analysis of odds of preterm birth at high versus low heat exposure at a long lag (n = 15 studies). Each line of the forest plot represents an odds/risk/hazard ratio from a study, represented by the vertical line, and the 95% confidence interval, represented by the horizontal line. The weight each study carries in overall odds is represented by the grey shaded square. The overall odds ratio and 95% confidence interval, using a random effect meta-analysis model, is represented by the diamond. The heterogeneity is illustrated by the I2 percentage in the bottom left of the figure.
