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Table 1 Summary of the maternal and newborn characteristics, cord blood hormone levels, and cord blood cell populations

From: Correlation of umbilical cord blood hormones and growth factors with stem cell potential: implications for the prenatal origin of breast cancer hypothesis

Variable n Meana Range
Subject characteristics    
   Mother's age (years) 289 30.0 ± 5.5 18.0–43.0
   Race/ethnicity of mother and biological father    
Both Caucasian   147 (58.33%)  
Both African-American   20 (7.94%)  
Both Asian   39 (15.48%)  
Both Hispanic   15 (5.95%)  
Mixed   31 (12.30%)  
No data   37  
   Parity    
First   118 (43.54%)  
Second   77 (28.41%)  
Third   46 (16.97%)  
Fourth and above   30 (11.07%)  
No data 18   
   Prepregnancy weight (kg) 199 62.7 ± 12.3 38.3–112.5
   Gestation duration (weeks) 289 39.6 ± 1.2 36.5–44.0
   Gender of the baby    
Male   134 (50.57%)  
Female   131 (49.43%)  
No data 24   
   Birth weight (g) 288 3,402.4 ± 431.9 2,256–4,660
   Cord blood volume (ml) 289 92.5 ± 24.6 44.5–201.5
Cord blood plasma hormone levels    
   Estradiol (ng/dl) 289 930.9 ± 528.6 40.6–3,305.4
   Unconjugated estriol (ng/ml) 289 331.0 ± 141.4 18.1–1,459.5
   Testosterone (ng/ml) 289 1.7 ± 0.9 0.3–9.2
   Sex hormone-binding globulin (nmol/l) 289 22.8 ± 8.0 6.7–55.0
   Progesterone (ng/ml) 289 226.6 ± 134.4 26.5–841.0
   Prolactin (ng/ml) 289 254.0 ± 103.6 47.4–686.0
   Insulin-like growth factor-1 (ng/ml) 289 81.2 ± 52.5 10.2–306.7
   Insulin-like growth factor binding protein-3 (ng/ml) 289 941.1 ± 309.9 300.0–2,534.0
Cord blood cell populations    
   Initial total nucleated cells × 106/ml 288b 16.1 ± 5.2 6.3–40.6
   Initial mononuclear cells × 106/ml 288b 7.6 ± 2.8 2.8–20.8
   CD34+ cells/103 mononuclear cells 289 8.9 ± 5.5 0.4–35.5
   CD34+CD38- cells/103 mononuclear cells 289 4.1 ± 2.7 0.0–14.4
   CD34+c-kit + cells/103 mononuclear cellsc 249 7.6 ± 4.9 0.2–34.4
   Granulocyte–macrophage colony-forming units/103 mononuclear cellsd 175 5.4 ± 3.2 0.5–19.7
  1. aData presented as mean ± standard deviation or mean (%). bInitial total nucleated cells/ml and mononuclear cells/ml values not determined in one sample. cOnly samples from the Tufts–New England Medical Center were assayed. dData only from Tufts–New England Medical Center-derived samples, due to a change in assay method.