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Table 1 Characteristics of women with and without hypertensive disorders in pregnancy, Nova Scotia, 1988–2000.

From: The effect of hypertensive disorders in pregnancy on small for gestational age and stillbirth: a population based study

Variable Normotensive
n = 121,760
Mild PIH
n = 10,460
Severe PIH
n = 1,770
HELLP
n = 202
Eclampsia
n = 32
Chronic HTN
n = 767
Chronic HTN
+PIH n = 475
Mean age in years (SD) 27.8 (5.3) 27.5 (5.4)* 26.9 (5.7)* 28.9 (5.5)* 25.6 (6.8)* 31.1 (5.0)* 30.5 (5.1)*
Married (%) 84,739 (69.6) 7,530 (72.0) 1,124 (63.5)* 145 (71.8) 18 (56.3) 638 (83.2)* 367 (77.3)*
Nulliparous (%) 51,057 (41.9) 6,760 (64.6)* 1,328 (75.0)* 158 (78.2)* 20 (62.5)* 324 (42.2)* 259 (54.5)*
Mean prepregnancy weight in kg (SD) 64.4 (13.8) 70.6 (16.7)* 67.6 (15.6)* 66.8 (16.0)* 68.2 (16.9) 82.0 (20.9)* 81.3 (20.9)*
Mean weight gain in kg (SD) 14.4 (6.0) 16.2 (6.9)* 16.5 (6.9)* 14.8 (7.0) 16.2 (6.2) 12.2 (6.7)* 13.2 (7.3)*
Smokes any cigarettes (%) 35,846 (30.7) 2,157 (21.5)* 376 (22.7)* 31 (16.0)* 6 (21.4) 150 (20.4)* 59 (13.0)*
Anemia (%) 3,441 (2.8) 242 (2.3)* 78 (4.3)* 15 (7.4)* 0 (0) 31 (4.1) 20 (4.2)
Gestational Diabetes (%) 2,749 (2.3) 485 (4.6)* 84 (4.8)* 3 (1.5) 2 (6.3) 70 (9.1)* 34 (7.2)*
Preexisting Diabetes (%) 331 (0.3) 85 (0.8)* 29 (1.6)* 4 (2.0)* 0 (0) 19 (2.5)* 9 (1.9)*
Anti-hypertensive medication (%) 0 (0) 107 (1.0) 97 (5.5) 23 (11.4) 5 (15.6) 146 (19.0) 122 (25.7)
Twins (%) 1,231 (1.0) 244 (2.3)* 60 (3.4)* 13 (6.4)* 0 (0) 7 (0.9) 13 (2.7)*
  1. PIH denotes pregnancy induced hypertension, HELLP denotes hemolysis, elevated liver enzymes, low platelets syndrome, HTN denotes hypertension. * Denotes hypertension categories significantly different from the normotensive category.