Kaplan-Meier curves
For gestational age at diagnosis of COVID-19, stratified by preeclampsia status during pregnancy. Blue represents no preeclampsia; red represents preeclampsia. Cox model hazard ratio, 1.49 (95% CI, 1.12–1.97). One woman was diagnosed with COVID-19 at ≤13 weeks’ gestation; 34 were diagnosed from >13 to ≤26 weeks’ gestation; 636 were diagnosed at >26 weeks’ gestation; for 35 women the information about the gestational age at diagnosis was not available.
Papageorghiou et al. Preeclampsia and COVID-19. Am J Obstet Gynecol 2021.