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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]