Extended Data Fig. 10: Power calculations for the secondary outcomes studied in this work.

Plots illustrate the power calculations for the cytokine storm (a), probable (b) and proven (c) sepsis, chorioamnionitis (d) and funisitis (e) outcomes and for a range of different odds ratios (OR). Calculations were based on the observed numbers of GBS positive and GBS negative placentas in the validation study, the observed proportion of the given outcome in the GBS negative group of the validation study, and a range of possible odds ratios. Alpha two sided and threshold = 0.05 were applied.