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. Author manuscript; available in PMC: 2020 May 1.
Published in final edited form as: Int J Gynaecol Obstet. 2019 May;145(Suppl 1):1–33. doi: 10.1002/ijgo.12802

Figure 1: Competing risk model. Distribution of gestational age at delivery for PE.

Figure 1:

In pregnancies at low risk for PE, the gestational-age distribution is shifted to the right and, in most pregnancies, delivery will occur before the development of PE. In pregnancies at high risk for PE, the distribution is shifted to the left. The risk of PE occurring at or before a specified gestational age is given by the area under the distribution curve. As an illustration, in the low-risk group, the risk of PE at <34 weeks of gestation is 0.01 or 1% and in the high-risk group, the risk is 0.6 or 60%. Diagram adopted from Wright et al.144