. Author manuscript; available in PMC: 2022 Dec 1.

Published in final edited form as: Am J Hematol. 2021 Sep 4;96(12):1655–1665. doi: 10.1002/ajh.26328

TABLE 2.

Frequency of preeclampsia, HELLP syndrome and eclampsia in all women and in women with platelet counts <100 × 10³/μL

Pregnancy complications	All women	Women with a platelet count < 100 000/μL
All women	13 488	335 (2.5%)
Preeclampsia	774 (5.74%)	52 (6.7%)^a
HELLP syndrome	54 (0.40%)	39 (72%)^a
Eclampsia	10 (0.07%)	2 (20%)^a

Note: Data are from women, ages 15–45, who delivered at the University of Oklahoma Medical Center between January 1, 2011 and August 19, 2014.⁸ Of all 15 723 deliveries during this time, 2238 deliveries were deleted because they were susbsequent pregnancies in the same woman or were missing platelet counts at delivery. Therefore the data for 13 488 women were analyzed. Column two presents the occurrence of preeclampsia, HELLP syndrome and eclampsia among all 13 488 women. To identify women with a platelet count <100 × 10³/μL, we used the lowest count at delivery, ±2 days. Column three presents the occurrence of platelet counts <100 × 10³/μL in all women, and also the occurrence of preeclampsia, HELLP syndrome and eclampsia among women with a platelet count of <100 × 10³/μL.

These percent data are the frequencies of women with preeclampsia, HELLP syndrome or eclampsia who had platelet counts <100 × 10³/μL.