Finally, the diagnostic criteria for severe preeclampsia were
compared. Rates of HELLP (hemolysis-elevated liver enzymes low
platelet count), abruption, eclampsia and fetal criteria were similar
between singleton and twin gestations. Women with a twin
gestation were more likely to be diagnosed with severe preeclampsia
based on lab abnormalities alone (12% vs 3%, P ¼ 0.002). All
other categories of diagnostic criteria were similar between twins
and singletons. Rates stratified by gestational age are reported
in Table 2.