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Table 1 Characteristics of mothers and children enrolled in the Pelotas 2004 Birth Cohort

From: Repeated high blood pressure at 6 and 11 years at the Pelotas 2004 birth cohort study

Characteristics (%) Original
cohort
(N = 4231)
Percentage
located at 11 years
(N = 3565)
p-value a Analyzed sample
(N = 3182)
p-value b
Maternal Characteristics
 Household income (quintiles)    < 0.001   < 0.001
  1 (poorest) 871 (20.6) 82.7   80.6  
  2 854 (20.2) 86.3   85.1  
  3 816 (19.3) 88.7   87.6  
  4 858 (20.3) 89.6   88.7  
  5 (wealthiest) 830 (19.6) 84.3   82.4  
 Age at childbirth (years)    0.001   0.001
  ≤ 20 1032 (24.4) 85.2   83.8  
  21–25 1129 (26.7) 83.8   82.1  
  26–30 924 (21.9) 86.6   85.2  
  31+ 1142 (27.0) 89.4   88.2  
 Smoking during pregnancy    0.059   0.079
  No 3067 (72.5) 86.9   85.5  
  Yes 1162 (27.5) 84.6   83.2  
 Gestational diabetes mellitus    0.011   0.008
  No 4100 (97.0) 86.0   84.6  
  Yes 126 (3.0) 94.2   93.7  
 Hypertensionc in pregnancy    0.623   0.546
  No 3220 (76.3) 86.2   84.7  
  Yes 1001 (23.7) 86.8   85.6  
Child Characteristics
 Sex    0.498   0.471
  Male 2195 (51.9) 85.9   84.5  
  Female 2034 (48.1) 86.6   85.3  
 Birth weight    0.776   0.517
  ≥ 2500 g 3803 (90.0) 86.3   85.0  
  < 2500 g 423 (10.0) 85.8   83.6  
 Gestational age (weeks)    0.202   0.171
  < 34 140 (3.3) 82.1   79.1  
  34–36 472 (11.2) 88.3   86.8  
  ≥ 37 3603 (85.5) 86.2   84.8  
 Weight-for-gestational age    0.628   0.585
  Small 526 (12.5) 85.7   84.3  
  Adequate 3390 (80.4) 86.2   84.8  
  Large 300 (7.1) 88.1   87.0  
 Skin color    0.159   0.095
  White 2726 (68.2) 88.3   87.1  
  Non-white 1272 (31.8) 89.8   89.0  
  1. aChi-square test to compare children enrolled in the 2004 Pelotas Birth Cohort and percentage located at the 11-year follow-up
  2. bChi-square test to compare children enrolled in the 2004 Pelotas Birth Cohort and proportion included in the analyses
  3. cHBP high blood pressure