Table 1.

Definitions of preeclampsia

	Blood Pressure Criteria	End Organ Criteria
Historic ACOG preeclampsia Defintion from Practice Bulletin 33-January, 2002(11)	Blood pressure of ≥140 mm Hg systolic or ≥90 mm Hg diastolic after 20 weeks of gestation in a woman with previously normal blood pressure Severe Preeclampsia-one or more of the bolded items: ≥160 mm Hg systolic or ≥110 mm Hg diastolic on two occasions at least 6 hours apart while the patient is on bedrest	Proteinuria, defined as urinary excretion of 0.3 g protein or higher in a 24 hour urine specimen Proteinuria of 5 g or higher in a 24 hour urine specimen or 3+ or greater on two random urine samples collected at least 4 hours apart Oliguria of less than 500 mL in 24 hours Cerebral or visual disturbances Pulmonary edema or cyanosis Epigastric or right upper quadrant pain Impaired liver function Thrombocytopenia Fetal growth restriction
ACOG Hypertension in Pregnancy Task Force Preeclampsia Definition November, 2013(1)	≥140 mm Hg systolic or ≥90 mm Hg diastolic on two occasions at least 4 hours apart after 20 weeks of gestation in a woman with a previously normal blood pressure ≥160 mm Hg systolic or ≥110 mm Hg diastolic, hypertension can be confirmed within a short interval (minutes) to facilitate timely antihypertensive therapy	Proteinuria Greater than or equal to 300 mg per 24-hour urine collection Protein/creatinine ratio≥0.3 Dipstick reading of 1+ OR In the absence of proteinuria, new-onset hypertension with the new onset of any of the following: Thrombocytopenia Renal insufficiency Impaired liver function Pulmonary edema Cerebral or visual symptoms
ISSHP Preeclampsia definition February, 2014(2)	Hypertension developing after 20 weeks gestation and the coexistence of one or more of the following new onset conditions:	Proteinuria Other maternal organ dysfunction ○ Renal insufficiency (Creatinine≥90 umol/L) ○ Liver involvement (elevated transaminases and/or severe right upper quadrant or epigastric pain) ○ Neurological complications ○ Hematological complications Uteroplacental dysfunction Fetal growth restriction

Bolded Items denote severe forms of disease