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Table 1 Maternal characteristics according to availability of pre-pregnancy charts

From: Pre-conception blood pressure and evidence of placental malperfusion

 No pre-pregnancy chartsPre-pregnancy chartsp
n = 106n = 96 
Maternal age  0.20
  < 206 (6)6 (6) 
 20–2953 (50)47 (49) 
 30 + −3947 (44)43 (45) 
Race/ethnicity
 White79 (75)70 (73)0.07
 Black16 (15)23 (24) 
 Other11 (10)3 (3) 
 Smoking7 (7)14 (15)0.04
Educationa  0.97
 High school28 (30)25 (34) 
 College47 (51)34 (47) 
 College+17 (19)14 (19) 
Hypertension  0.73
 None76 (72)73 (76) 
 Gestational11 (10)11 (12) 
 Preeclampsia17 (16)10 (10) 
 Chronic2 (2)2 (2) 
Diabetesa  0.41
 None94 (89)84 (90) 
 Gestational10 (9)9 (10) 
 Pre-existing DM2 (2)0 
 Primiparous75 (71)55 (57)0.09
 Fetal sex male52 (49)51 (53)0.31
 Gestational age, weeks37.6 (3.2)38.0 (3.1)0.30
Preterm birth  0.14
 Term82 (77)84 (88) 
 Spontaneous12 (11)8 (8) 
 Indicated12 (11)4 (4) 
  1. aMissing data for the following, Education: n = 14 for women with no pre-pregnancy charts; n = 23 for women with pre-pregnancy charts; Diabetes: n = 3 for women with pre-pregnancy records