Table 2. Labor and delivery factors in women delivered for hypertensive disorder of pregnancy.

	Readmitteda (n = 25)	Not readmitted (n = 74)	P-value
GA (weeks) at time of diagnosis	35.4 (±4)	35.3 (±3.6)	0.90
Peak systolic BP recorded on admission note (mm Hg)	165.4 (±22.1)	164 (±19.3)	0.76
Peak diastolic BP recorded on admission note (mm Hg)	101 (±16.9)	99.5 (±12.2)	0.62
Severity of PRE			0.39
GHTN	4 (16)	11 (14.9)
Mild PRE	1 (4)	1 (1.4)
Severe PRE	14 (56)	40 (54.1)
HELLP	3 (12)	13 (18)
Superimposed PRE	3 (12)	8 (10.8)
Eclampsia	0 (0)	1 (0.01)
Labor induction/augmentation	17 (68)	50 (67.57)	0.97
Vaginal delivery	8 (47)	28 (56)	0.52
Cesarean delivery	9 (53)	22 (44)
Overall cesarean delivery	15 (60)	36 (48.7)	0.33
Number of IV antihypertensive doses given before deliveryb	1.6 (±1.4)	1.5 (±1.3)	0.76
Intravenous fluidsc
Fluid balance (cc)	1182.9 (±1861.2)	575.4 (±2193.0)	0.22
Total pre-delivery input (cc)	3780.2 (±2301.5)	3851.0 (±2995.6)	0.91
Lab abnormalitiesd	16 (64)	49 (66.2)	0.84
Use of magnesium sulfate in labor and 24 h post partum	20 (80)	64 (86.4)	0.55

Abbreviations: ALT, alanine transaminase; AST, aspartate aminotransferase; BP, blood pressure; Cr, creatinine; GA, gestational age; GHTN, gestational hypertension; HELLP, hemolysis, elevated liver enzymes, low platelets; plt, platelet; PRE, preeclampsia. Categorical data: n (%). Continuous data: mean (s.d.).

^aReadmitted= postpartum hypertension readmissions within 4 weeks of discharge.

^bIf received BP medication.

^cFluid balance=intravenous fluids in (labor intravenous fluids +cesarean intraop intravenous fluids)– output (estimated blood loss, labor urine output+CD urine output); total pre-delivery intravenous fluids=labor intravenous fluids+cesarean intraop intravenous fluids.

^dLab abnormalities=any of the following: Plt <100 thousand μl⁻¹, Cr >1.0 mg dl⁻¹, AST >45 U l⁻¹, ALT >60 U l⁻¹.