Table 1.

Frequency of laboratory abnormalities among women with pregnancy-associated hypertension

	No laboratory abnormalities (n=2,551)	Laboratory Abnormalities (n=201)
Mild hypertension without clinical signs	Category I – 1,690 (95.1)	Category II – 88 (4.9; 95% CI 3.9,6.0)
Severe hypertension without clinical signs	Category III – 163 (91.1)	Category IV – 16 (8.9; 95% CI 4.8,13.1)
Mild or severe hypertension with severe clinical signs**	Category III – 698 (87.8)	Category IV – 97 (12.2; 95% CI 9.9,14.5)

Data are n (%) or 95% confidence interval.

^**Defined as at least one of the following: headache, blurred vision, epigastric pain, pulmonary edema, eclampsia, or oliguria