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Table 3 Comparison of distributions of selected characteristics among Caucasian singleton births which were or were not included in the study.

From: Optimal fetal growth for the Caucasian singleton and assessment of appropriateness of fetal growth: an analysis of a total population perinatal database

  Included Excluded*  
Denominator, N 62,747 maximum 41,146  
   Sex    p
Male fetus, % (N) 50.62 (31,760) 51.63 (21,242) 0.0014
   Gestational age    
Mean GA (sd), wks 39.0 (1.6) 38.2 (2.6) <.0001
GA<37 weeks, % (N) 4.55 (2,856) 9.96 (4,099) <.0001
GA<33 weeks, % (N) 0.53 (334) 2.65 (1,092) <.0001
5th-95th percentile, wks 37–41 35–41  
   Birth weight    
Mean weight (sd), g.   3,282 (641) <.0001
5th-95th percentile, g 2695–4270 2265–4170  
   Birth length    
Mean length (sd), cm 50.4 (2.5) 49.5 (3.7) <.0001
5th-95th percentile, cm 46–54 45–54  
   Birth head circumference    
Mean circumference, cm 34.7 (1.6) 34.2 (2.4) <.0001
5th-95th percentile, cm 32–37 31–37  
   Maternal characteristics    
Mean height, cm 165.1 (6.7) 164.7 (6.7) <.0001
5th-95th percentile, cm 154–176 153–176  
Mean age, y 29.4 (5.2) 28.5 (5.7) <.0001
5th-95th percentile, y 20–38 19–38  
Socio-economic Disadvantage† 1009.3 (78.8) 984.7 (86.0) <.0001
  1. * Variable denominators as a result of missing values.
  2. † [29]