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. Author manuscript; available in PMC: 2018 Apr 3.
Published in final edited form as: Am J Obstet Gynecol. 2016 Apr 9;215(3):359.e1–359.e9. doi: 10.1016/j.ajog.2016.04.002

FIGURE. Identification flowchart of early-onset preeclampsia cases and controls.

FIGURE

Step-by-step sample selection. Exclusion rates in each step vary between race-ethnicity groups due to different population distributions and exclusion details by race-ethnicity groups.