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Table 1 Some sociodemographic characteristics of women included according to PE status

From: Mean arterial blood pressure: potential predictive tool for preeclampsia in a cohort of healthy nulliparous pregnant women

CharacteristicsEarly-onset PE n (%)Late-onset PE n (%)No PE n (%)p value*
Maternal age   0.605
  < 20 years1 (7.1)19 (26.0)271 (25.1) 
 20–34 years12 (85.8)48 (65.8)736 (68.3) 
  > 34 years1 (7.1)6 (8.2)71 (6.6) 
Ethnicity   0.146
 White7 (50.0)20 (27.4)435 (40.4) 
 Others7 (50.0)53 (72.6)643 (59.6) 
Marital status a   0.975
 With partner10 (71.4)53 (72.6)777 (72.4) 
 Without partner4 (28.6)20 (27.4)296 (27.6) 
Schooling (years)   0.717
 Up to 128 (57.1)50 (68.5)733 (68.0) 
  ≥ 126 (42.9)23 (31.5)345 (32.0) 
Annual family income   0.691
 Up to 3000 US$3 (21.4)21 (28.8)280 (26.0) 
 3000–6000 US$4 (28.6)27 (37.0)350 (32.5) 
  > 6000 US$7 (50.0)25 (34.2)448 (41.5) 
Source of prenatal care   0.473
 Entirely public14 (100.0)67 (91.8)927 (86.0) 
 Private/mixed0 (−)6 (8.2)151 (14.0) 
Total14731078 
  1. *p-value from Chi-square design-based
  2. a missing information for 5 cases