Subsequent pregnancies in the PET group were characterized by a higher rate of preterm delivery at less than 37 and 34 weeks (15.2% vs. 5.7%, P<0.001 and 3.8% vs. 0.8%, P<0.001, respectively), placental abruption (1.7% vs. 0.2%, P=0.004), IUGR (2.8% vs. 0.9%, P=0.016), and PET (5.9% vs. 0.8%, P<0.001). Risk factors for PET and adverse outcome in the subsequent pregnancy included: PET complicated by placental abruption in the index pregnancy (OR=10.8, 95%-CI=1.8-34.6), PET requiring delivery prior to 34 weeks in the index pregnancy (OR=6.5, 95%-CI=1.6-22.5), chronic hypertension (OR=5.3, 95%-CI=1.9-12.7), and maternal age>35 (OR=4.3, 95%-CI=1.2-20.5).http://www.ncbi.nlm.nih.gov/pubmed/22524456
Okay, a lot of numbers.
The authors abbreviate preeclampsia as PET (which stands for pre-eclamptic toxemia) - I usually see this done when they are including pulmonary embolism as a potential outcome and are abbreviating it as PE.
It is hard to make columns in this format - I will try to make a graphic and share it later, but for now the first line of numbers is your odds in a second pregnancy if you have a history of preeclamptic pregnancy, and the second is your odds if you do not have that history. So us, compared to normotensive pregnancies.
Condition | our odds | normotensive odds
delivery before 37 weeks | 15.2% | 5.7%
delivery before 34 weeks | 3.8% |0.8%
abruption | 1.7% | 0.2%
IUGR | 2.8% | .9%
preeclampsia | 5.9% | .8%
Obviously, they didn't break out preterm preeclamptics in this data, because that 5.9% risk of recurrence is way lower than it is if you had a baby before 32 weeks. This includes people who hit 140/90 twice and had proteinuria at 39 weeks, got induced, and didn't really realize that they'd had preeclampsia.
Then they give your odds that things will go kablooey, relative to normal odds, for a couple of combinations of issues. If you had preeclampsia and an abruption last time, your chances of preeclampsia and something going wrong this time are 10.2 times higher than normal. Technically, I think they call that "a lot higher." If you had preeclampsia and needed to be delivered before 34 weeks, chances things go wrong are 6.5x higher. If you are a chronic, 5.3x. If you are over 35, 4.3x.
In other words, if you had preterm preeclampsia and you're a chronic over 35 *raises hand* stuff goes kablooey with awesome regularity.
I'll go muck about in Photoshop in a bit.